51655020 has 24 divisors (see below), whose sum is σ = 144634224. Its totient is φ = 13774656.

The previous prime is 51655013. The next prime is 51655067. The reversal of 51655020 is 2055615.

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 7 ways as a sum of consecutive naturals, for example, 430399 + ... + 430518.

It is an arithmetic number, because the mean of its divisors is an integer number (6026426).

Almost surely, 2^51655020 is an apocalyptic number.

It is an amenable number.

51655020 is an abundant number, since it is smaller than the sum of its proper divisors (92979204).

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

51655020 is a wasteful number, since it uses less digits than its factorization.

51655020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860929 (or 860927 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51655020 is about 7187.1426867706. The cubic root of 51655020 is about 372.4238722557.

The spelling of 51655020 in words is "fifty-one million, six hundred fifty-five thousand, twenty".