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31312313110 = 25131371758131
BaseRepresentation
bin11101001010010110…
…111111101100010110
32222211012122022112101
4131022112333230112
51003111423004420
622215031312314
72155643161411
oct351226775426
988735568471
1031312313110
1112308a91321
12609a51b69a
132c50221730
141730852b78
15c33e4c60a
hex74a5bfb16

31312313110 has 32 divisors (see below), whose sum is σ = 61140798432. Its totient is φ = 11477072640.

The previous prime is 31312313083. The next prime is 31312313113. The reversal of 31312313110 is 1131321313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312313113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861256 + ... + 896875.

It is an arithmetic number, because the mean of its divisors is an integer number (1910649951).

Almost surely, 231312313110 is an apocalyptic number.

31312313110 is a deficient number, since it is larger than the sum of its proper divisors (29828485322).

31312313110 is a wasteful number, since it uses less digits than its factorization.

31312313110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758288.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31312313110 its reverse (1131321313), we get a palindrome (32443634423).

The spelling of 31312313110 in words is "thirty-one billion, three hundred twelve million, three hundred thirteen thousand, one hundred ten".

Divisors: 1 2 5 10 13 26 65 130 137 274 685 1370 1781 3562 8905 17810 1758131 3516262 8790655 17581310 22855703 45711406 114278515 228557030 240863947 481727894 1204319735 2408639470 3131231311 6262462622 15656156555 31312313110