56877721320131 has 2 divisors, whose sum is σ = 56877721320132. Its totient is φ = 56877721320130.

The previous prime is 56877721320113. The next prime is 56877721320239. The reversal of 56877721320131 is 13102312777865.

It is a happy number.

Together with previous prime (56877721320113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56877721320131 - 2¹⁴ = 56877721303747 is a prime.

It is a super-2 number, since 2×56877721320131² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56877721320631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28438860660065 + 28438860660066.

It is an arithmetic number, because the mean of its divisors is an integer number (28438860660066).

Almost surely, 2^{56877721320131} is an apocalyptic number.

56877721320131 is a deficient number, since it is larger than the sum of its proper divisors (1).

56877721320131 is an equidigital number, since it uses as much as digits as its factorization.

56877721320131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 56877721320131 in words is "fifty-six trillion, eight hundred seventy-seven billion, seven hundred twenty-one million, three hundred twenty thousand, one hundred thirty-one".