51129072 has 30 divisors (see below), whose sum is σ = 143090792. Its totient is φ = 17042976.

The previous prime is 51129007. The next prime is 51129101. The reversal of 51129072 is 27092115.

It is a super-2 number, since 2×51129072² = 5228364007162368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177388 + ... + 177675.

Almost surely, 2^51129072 is an apocalyptic number.

It is an amenable number.

51129072 is an abundant number, since it is smaller than the sum of its proper divisors (91961720).

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

51129072 is a wasteful number, since it uses less digits than its factorization.

51129072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355077 (or 355068 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51129072 is about 7150.4595656503. The cubic root of 51129072 is about 371.1555594216.

The spelling of 51129072 in words is "fifty-one million, one hundred twenty-nine thousand, seventy-two".