25351512013531 has 8 divisors (see below), whose sum is σ = 27884758519728. Its totient is φ = 23046829102000.

The previous prime is 25351512013511. The next prime is 25351512013547. The reversal of 25351512013531 is 13531021515352.

It is a happy number.

It is not a de Polignac number, because 25351512013531 - 2⁷ = 25351512013403 is a prime.

It is a super-2 number, since 2×25351512013531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25351512013511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9523481770 + ... + 9523484431.

It is an arithmetic number, because the mean of its divisors is an integer number (3485594814966).

Almost surely, 2^{25351512013531} is an apocalyptic number.

25351512013531 is a deficient number, since it is larger than the sum of its proper divisors (2533246506197).

25351512013531 is an equidigital number, since it uses as much as digits as its factorization.

25351512013531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19046966234 (or 19046966212 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 37.

Adding to 25351512013531 its reverse (13531021515352), we get a palindrome (38882533528883).

The spelling of 25351512013531 in words is "twenty-five trillion, three hundred fifty-one billion, five hundred twelve million, thirteen thousand, five hundred thirty-one".