251542172404 has 12 divisors (see below), whose sum is σ = 452096066884. Its totient is φ = 122371867584.

The previous prime is 251542172353. The next prime is 251542172449. The reversal of 251542172404 is 404271245152.

251542172404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 217519632100 + 34022540304 = 466390^2 + 184452^2 .

It is a super-3 number, since 3×251542172404³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849804489 + ... + 849804784.

Almost surely, 2^251542172404 is an apocalyptic number.

It is an amenable number.

251542172404 is a deficient number, since it is larger than the sum of its proper divisors (200553894480).

251542172404 is a wasteful number, since it uses less digits than its factorization.

251542172404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699609314 (or 1699609312 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 37.

The spelling of 251542172404 in words is "two hundred fifty-one billion, five hundred forty-two million, one hundred seventy-two thousand, four hundred four".