251652610333225 has 24 divisors (see below), whose sum is σ = 325618217350272. Its totient is φ = 192567994502400.

The previous prime is 251652610333181. The next prime is 251652610333231. The reversal of 251652610333225 is 522333016256152.

It is a happy number.

It is not a de Polignac number, because 251652610333225 - 2⁹ = 251652610332713 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, 127610460 + ... + 129567490.

It is an arithmetic number, because the mean of its divisors is an integer number (13567425722928).

Almost surely, 2^{251652610333225} is an apocalyptic number.

251652610333225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251652610333225 is a deficient number, since it is larger than the sum of its proper divisors (73965607017047).

251652610333225 is a wasteful number, since it uses less digits than its factorization.

251652610333225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180697 (or 2180692 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 46.

Adding to 251652610333225 its reverse (522333016256152), we get a palindrome (773985626589377).

The spelling of 251652610333225 in words is "two hundred fifty-one trillion, six hundred fifty-two billion, six hundred ten million, three hundred thirty-three thousand, two hundred twenty-five".