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57215110631 = 7217211132537
BaseRepresentation
bin110101010010010010…
…010100110111100111
312110200102022202201112
4311102102110313213
51414134032020011
642141222215235
74063562262500
oct652222246747
9173612282645
1057215110631
11222a04904a8
12b10928451b
13551a7c0a63
142aaaa83ba7
15174d00058b
hexd52494de7

57215110631 has 24 divisors (see below), whose sum is σ = 70506982656. Its totient is φ = 46133445120.

The previous prime is 57215110607. The next prime is 57215110637. The reversal of 57215110631 is 13601151275.

It is not a de Polignac number, because 57215110631 - 218 = 57214848487 is a prime.

It is a super-2 number, since 2×572151106312 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57215110637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1742195 + ... + 1774731.

It is an arithmetic number, because the mean of its divisors is an integer number (2937790944).

Almost surely, 257215110631 is an apocalyptic number.

57215110631 is a deficient number, since it is larger than the sum of its proper divisors (13291872025).

57215110631 is a wasteful number, since it uses less digits than its factorization.

57215110631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34679 (or 34672 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The spelling of 57215110631 in words is "fifty-seven billion, two hundred fifteen million, one hundred ten thousand, six hundred thirty-one".

Divisors: 1 7 17 49 119 833 2111 14777 32537 35887 103439 227759 251209 553129 1594313 1758463 3871903 27103321 68685607 480799249 1167655319 3365594743 8173587233 57215110631