51137120 has 24 divisors (see below), whose sum is σ = 120811824. Its totient is φ = 20454784.

The previous prime is 51137117. The next prime is 51137143. The reversal of 51137120 is 2173115.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 51137092 and 51137101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159644 + ... + 159963.

It is an arithmetic number, because the mean of its divisors is an integer number (5033826).

Almost surely, 2^51137120 is an apocalyptic number.

It is an amenable number.

51137120 is an abundant number, since it is smaller than the sum of its proper divisors (69674704).

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

51137120 is a wasteful number, since it uses less digits than its factorization.

51137120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319622 (or 319614 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 51137120 is about 7151.0223045380. The cubic root of 51137120 is about 371.1750323823.

The spelling of 51137120 in words is "fifty-one million, one hundred thirty-seven thousand, one hundred twenty".