53815864 has 16 divisors (see below), whose sum is σ = 101849400. Its totient is φ = 26656032.

The previous prime is 53815859. The next prime is 53815873. The reversal of 53815864 is 46851835.

It is a super-2 number, since 2×53815864² = 5792294436132992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30579 + ... + 32290.

Almost surely, 2^53815864 is an apocalyptic number.

It is an amenable number.

53815864 is a deficient number, since it is larger than the sum of its proper divisors (48033536).

53815864 is a wasteful number, since it uses less digits than its factorization.

53815864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62982 (or 62978 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 53815864 is about 7335.9296616039. The cubic root of 53815864 is about 377.5462019676.

The spelling of 53815864 in words is "fifty-three million, eight hundred fifteen thousand, eight hundred sixty-four".