51129168 has 40 divisors (see below), whose sum is σ = 136348416. Its totient is φ = 16492800.

The previous prime is 51129167. The next prime is 51129179. The reversal of 51129168 is 86192115.

It is a super-2 number, since 2×51129168² = 5228383640744448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51129167) 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, 15693 + ... + 18668.

Almost surely, 2^51129168 is an apocalyptic number.

It is an amenable number.

51129168 is an abundant number, since it is smaller than the sum of its proper divisors (85219248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51129168 is a wasteful number, since it uses less digits than its factorization.

51129168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34403 (or 34397 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 51129168 is about 7150.4662785024. The cubic root of 51129168 is about 371.1557917155.

The spelling of 51129168 in words is "fifty-one million, one hundred twenty-nine thousand, one hundred sixty-eight".