53239863 has 16 divisors (see below), whose sum is σ = 71827200. Its totient is φ = 35076096.

The previous prime is 53239859. The next prime is 53239867. The reversal of 53239863 is 36893235.

It is an interprime number because it is at equal distance from previous prime (53239859) and next prime (53239867).

It is not a de Polignac number, because 53239863 - 2² = 53239859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53239867) 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, 153256 + ... + 153602.

It is an arithmetic number, because the mean of its divisors is an integer number (4489200).

Almost surely, 2^53239863 is an apocalyptic number.

53239863 is a deficient number, since it is larger than the sum of its proper divisors (18587337).

53239863 is a wasteful number, since it uses less digits than its factorization.

53239863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806.

The product of its digits is 116640, while the sum is 39.

The square root of 53239863 is about 7296.5651508090. The cubic root of 53239863 is about 376.1943855872.

The spelling of 53239863 in words is "fifty-three million, two hundred thirty-nine thousand, eight hundred sixty-three".