51923220 has 48 divisors (see below), whose sum is σ = 148938048. Its totient is φ = 13507840.

The previous prime is 51923177. The next prime is 51923237. The reversal of 51923220 is 2232915.

It is a congruent number.

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, 8094 + ... + 13013.

It is an arithmetic number, because the mean of its divisors is an integer number (3102876).

Almost surely, 2^51923220 is an apocalyptic number.

It is an amenable number.

51923220 is an abundant number, since it is smaller than the sum of its proper divisors (97014828).

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

51923220 is a wasteful number, since it uses less digits than its factorization.

51923220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21160 (or 21158 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 51923220 is about 7205.7768491676. The cubic root of 51923220 is about 373.0673186482.

The spelling of 51923220 in words is "fifty-one million, nine hundred twenty-three thousand, two hundred twenty".