52921390 has 32 divisors (see below), whose sum is σ = 101730816. Its totient is φ = 19773600.

The previous prime is 52921361. The next prime is 52921397. The reversal of 52921390 is 9312925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52921397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7215 + ... + 12565.

It is an arithmetic number, because the mean of its divisors is an integer number (3179088).

Almost surely, 2^52921390 is an apocalyptic number.

52921390 is a deficient number, since it is larger than the sum of its proper divisors (48809426).

52921390 is a wasteful number, since it uses less digits than its factorization.

52921390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5424.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 52921390 is about 7274.7089288851. The cubic root of 52921390 is about 375.4427718174.

The spelling of 52921390 in words is "fifty-two million, nine hundred twenty-one thousand, three hundred ninety".