251523062225 has 12 divisors (see below), whose sum is σ = 312115798236. Its totient is φ = 201071868480.

The previous prime is 251523062201. The next prime is 251523062243. The reversal of 251523062225 is 522260325152.

It can be written as a sum of positive squares in 6 ways, for example, as 19808873536 + 231714188689 = 140744^2 + 481367^2 .

It is not a de Polignac number, because 251523062225 - 2²⁸ = 251254626769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3629522 + ... + 3698171.

It is an arithmetic number, because the mean of its divisors is an integer number (26009649853).

Almost surely, 2^251523062225 is an apocalyptic number.

251523062225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251523062225 is a deficient number, since it is larger than the sum of its proper divisors (60592736011).

251523062225 is a wasteful number, since it uses less digits than its factorization.

251523062225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7329076 (or 7329071 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 251523062225 its reverse (522260325152), we get a palindrome (773783387377).

The spelling of 251523062225 in words is "two hundred fifty-one billion, five hundred twenty-three million, sixty-two thousand, two hundred twenty-five".