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31057032541 = 6128346421
BaseRepresentation
bin11100111011001001…
…001011010101011101
32222011102021201102111
4130323021023111131
51002101100020131
622133431554021
72146423264243
oct347311132535
988142251374
1031057032541
1112197981247
126028b2b911
132c0c380642
1417089a0793
15c1b823ab1
hex73b24b55d

31057032541 has 6 divisors (see below), whose sum is σ = 31574514426. Its totient is φ = 30547897200.

The previous prime is 31057032493. The next prime is 31057032547. The reversal of 31057032541 is 14523075013.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 972130041 + 30084902500 = 31179^2 + 173450^2 .

It is not a de Polignac number, because 31057032541 - 229 = 30520161629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31057032547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4169490 + ... + 4176931.

It is an arithmetic number, because the mean of its divisors is an integer number (5262419071).

Almost surely, 231057032541 is an apocalyptic number.

It is an amenable number.

31057032541 is a deficient number, since it is larger than the sum of its proper divisors (517481885).

31057032541 is an frugal number, since it uses more digits than its factorization.

31057032541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346543 (or 8346482 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 31057032541 in words is "thirty-one billion, fifty-seven million, thirty-two thousand, five hundred forty-one".

Divisors: 1 61 3721 8346421 509131681 31057032541