51565520231541 has 12 divisors (see below), whose sum is σ = 78864913295532. Its totient is φ = 32354836223616.

The previous prime is 51565520231521. The next prime is 51565520231591. The reversal of 51565520231541 is 14513202556515.

51565520231541 is a `hidden beast` number, since 5 + 1 + 5 + 6 + 55 + 20 + 2 + 31 + 541 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38814407674641 + 12751112556900 = 6230121^2 + 3570870^2 .

It is not a de Polignac number, because 51565520231541 - 2⁵ = 51565520231509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51565520231521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168514771846 + ... + 168514772151.

It is an arithmetic number, because the mean of its divisors is an integer number (6572076107961).

Almost surely, 2^{51565520231541} is an apocalyptic number.

51565520231541 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51565520231541 is a deficient number, since it is larger than the sum of its proper divisors (27299393063991).

51565520231541 is a wasteful number, since it uses less digits than its factorization.

51565520231541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337029544020 (or 337029544017 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The spelling of 51565520231541 in words is "fifty-one trillion, five hundred sixty-five billion, five hundred twenty million, two hundred thirty-one thousand, five hundred forty-one".