251342104225 has 24 divisors (see below), whose sum is σ = 333146927232. Its totient is φ = 187640323200.

The previous prime is 251342104147. The next prime is 251342104253. The reversal of 251342104225 is 522401243152.

It is a happy number.

It is not a de Polignac number, because 251342104225 - 2¹⁷ = 251341973153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5307117 + ... + 5354266.

It is an arithmetic number, because the mean of its divisors is an integer number (13881121968).

Almost surely, 2^251342104225 is an apocalyptic number.

251342104225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251342104225 is a deficient number, since it is larger than the sum of its proper divisors (81804823007).

251342104225 is a wasteful number, since it uses less digits than its factorization.

251342104225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661457 (or 10661452 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 251342104225 its reverse (522401243152), we get a palindrome (773743347377).

The spelling of 251342104225 in words is "two hundred fifty-one billion, three hundred forty-two million, one hundred four thousand, two hundred twenty-five".