51117924 has 48 divisors (see below), whose sum is σ = 140132160. Its totient is φ = 14298240.

The previous prime is 51117901. The next prime is 51117931. The reversal of 51117924 is 42971115.

It is a super-2 number, since 2×51117924² = 5226084308139552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51117891 and 51117900.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13179 + ... + 16610.

It is an arithmetic number, because the mean of its divisors is an integer number (2919420).

Almost surely, 2^51117924 is an apocalyptic number.

It is an amenable number.

51117924 is an abundant number, since it is smaller than the sum of its proper divisors (89014236).

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

51117924 is a wasteful number, since it uses less digits than its factorization.

51117924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29820 (or 29818 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 51117924 is about 7149.6799928388. The cubic root of 51117924 is about 371.1285823173.

The spelling of 51117924 in words is "fifty-one million, one hundred seventeen thousand, nine hundred twenty-four".