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55284831 = 3274718671
BaseRepresentation
bin1101001011100…
…1010001011111
310212000202112100
43102321101133
5103123103311
65252540143
71240625160
oct322712137
9125022470
1055284831
1129230348
1216621653
13b5b8a24
1474b1767
154cc0a56
hex34b945f

55284831 has 24 divisors (see below), whose sum is σ = 93210624. Its totient is φ = 30917520.

The previous prime is 55284809. The next prime is 55284839. The reversal of 55284831 is 13848255.

It is a happy number.

It is not a de Polignac number, because 55284831 - 26 = 55284767 is a prime.

It is a super-2 number, since 2×552848312 = 6112825077397122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55284839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6375 + ... + 12296.

It is an arithmetic number, because the mean of its divisors is an integer number (3883776).

Almost surely, 255284831 is an apocalyptic number.

55284831 is a deficient number, since it is larger than the sum of its proper divisors (37925793).

55284831 is a wasteful number, since it uses less digits than its factorization.

55284831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18731 (or 18728 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 55284831 is about 7435.3769911148. The cubic root of 55284831 is about 380.9506001631.

The spelling of 55284831 in words is "fifty-five million, two hundred eighty-four thousand, eight hundred thirty-one".

Divisors: 1 3 7 9 21 47 63 141 329 423 987 2961 18671 56013 130697 168039 392091 877537 1176273 2632611 6142759 7897833 18428277 55284831