52157920 has 24 divisors (see below), whose sum is σ = 123223464. Its totient is φ = 20863104.

The previous prime is 52157909. The next prime is 52157923. The reversal of 52157920 is 2975125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52157923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162834 + ... + 163153.

It is an arithmetic number, because the mean of its divisors is an integer number (5134311).

Almost surely, 2^52157920 is an apocalyptic number.

It is an amenable number.

52157920 is an abundant number, since it is smaller than the sum of its proper divisors (71065544).

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

52157920 is a wasteful number, since it uses less digits than its factorization.

52157920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326002 (or 325994 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 52157920 is about 7222.0440319898. The cubic root of 52157920 is about 373.6285788060.

The spelling of 52157920 in words is "fifty-two million, one hundred fifty-seven thousand, nine hundred twenty".