51922220 has 24 divisors (see below), whose sum is σ = 124613664. Its totient is φ = 17801856.

The previous prime is 51922219. The next prime is 51922261. The reversal of 51922220 is 2222915.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185297 + ... + 185576.

It is an arithmetic number, because the mean of its divisors is an integer number (5192236).

Almost surely, 2^51922220 is an apocalyptic number.

It is an amenable number.

51922220 is an abundant number, since it is smaller than the sum of its proper divisors (72691444).

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

51922220 is a wasteful number, since it uses less digits than its factorization.

51922220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370889 (or 370887 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51922220 is about 7205.7074600625. The cubic root of 51922220 is about 373.0649236393.

The spelling of 51922220 in words is "fifty-one million, nine hundred twenty-two thousand, two hundred twenty".