52621921 has 16 divisors (see below), whose sum is σ = 59693760. Its totient is φ = 45949120.

The previous prime is 52621913. The next prime is 52621927. The reversal of 52621921 is 12912625.

It is a cyclic number.

It is not a de Polignac number, because 52621921 - 2³ = 52621913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52621921.

It is not an unprimeable number, because it can be changed into a prime (52621927) 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, 93186 + ... + 93748.

It is an arithmetic number, because the mean of its divisors is an integer number (3730860).

Almost surely, 2^52621921 is an apocalyptic number.

It is an amenable number.

52621921 is a deficient number, since it is larger than the sum of its proper divisors (7071839).

52621921 is a wasteful number, since it uses less digits than its factorization.

52621921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its digits is 2160, while the sum is 28.

The square root of 52621921 is about 7254.0968424746. The cubic root of 52621921 is about 374.7332526710.

The spelling of 52621921 in words is "fifty-two million, six hundred twenty-one thousand, nine hundred twenty-one".