51257225531 has 2 divisors, whose sum is σ = 51257225532. Its totient is φ = 51257225530.

The previous prime is 51257225519. The next prime is 51257225563. The reversal of 51257225531 is 13552275215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51257225531 - 2²⁶ = 51190116667 is a prime.

It is a super-2 number, since 2×51257225531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51257255531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25628612765 + 25628612766.

It is an arithmetic number, because the mean of its divisors is an integer number (25628612766).

Almost surely, 2^51257225531 is an apocalyptic number.

51257225531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51257225531 is an equidigital number, since it uses as much as digits as its factorization.

51257225531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105000, while the sum is 38.

The spelling of 51257225531 in words is "fifty-one billion, two hundred fifty-seven million, two hundred twenty-five thousand, five hundred thirty-one".