53213864 has 24 divisors (see below), whose sum is σ = 109673130. Its totient is φ = 24187680.

The previous prime is 53213863. The next prime is 53213891. The reversal of 53213864 is 46831235.

It can be written as a sum of positive squares in only one way, i.e., 46812964 + 6400900 = 6842^2 + 2530^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 53213864.

It is not an unprimeable number, because it can be changed into a prime (53213863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26519 + ... + 28454.

Almost surely, 2^53213864 is an apocalyptic number.

It is an amenable number.

53213864 is an abundant number, since it is smaller than the sum of its proper divisors (56459266).

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

53213864 is a wasteful number, since it uses less digits than its factorization.

53213864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55001 (or 54986 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 53213864 is about 7294.7833415393. The cubic root of 53213864 is about 376.1331390587.

The spelling of 53213864 in words is "fifty-three million, two hundred thirteen thousand, eight hundred sixty-four".