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55102190 = 251121331113
BaseRepresentation
bin1101001000110…
…0101011101110
310211200110222212
43102030223232
5103101232230
65245010422
71236234533
oct322145356
9124613885
1055102190
1129116100
1216553a12
13b553860
147464d8a
154c86895
hex348caee

55102190 has 96 divisors (see below), whose sum is σ = 122266368. Its totient is φ = 17740800.

The previous prime is 55102129. The next prime is 55102193. The reversal of 55102190 is 9120155.

It is a super-2 number, since 2×551021902 = 6072502685592200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55102193) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 487574 + ... + 487686.

It is an arithmetic number, because the mean of its divisors is an integer number (1273608).

Almost surely, 255102190 is an apocalyptic number.

55102190 is an abundant number, since it is smaller than the sum of its proper divisors (67164178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55102190 is a wasteful number, since it uses less digits than its factorization.

55102190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 55102190 is about 7423.0849382181. The cubic root of 55102190 is about 380.5306298776.

The spelling of 55102190 in words is "fifty-five million, one hundred two thousand, one hundred ninety".

Divisors: 1 2 5 10 11 13 22 26 31 55 62 65 110 113 121 130 143 155 226 242 286 310 341 403 565 605 682 715 806 1130 1210 1243 1430 1469 1573 1705 2015 2486 2938 3146 3410 3503 3751 4030 4433 6215 7006 7345 7502 7865 8866 12430 13673 14690 15730 16159 17515 18755 22165 27346 32318 35030 37510 38533 44330 45539 48763 68365 77066 80795 91078 97526 136730 161590 177749 192665 227695 243815 355498 385330 423863 455390 487630 500929 847726 888745 1001858 1777490 2119315 2504645 4238630 5009290 5510219 11020438 27551095 55102190