53644731 has 16 divisors (see below), whose sum is σ = 81849600. Its totient is φ = 30614688.

The previous prime is 53644729. The next prime is 53644739. The reversal of 53644731 is 13744635.

It is not a de Polignac number, because 53644731 - 2¹ = 53644729 is a prime.

It is a super-2 number, since 2×53644731² = 5755514328124722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53644692 and 53644701.

It is not an unprimeable number, because it can be changed into a prime (53644739) 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, 25425 + ... + 27453.

It is an arithmetic number, because the mean of its divisors is an integer number (5115600).

Almost surely, 2^53644731 is an apocalyptic number.

53644731 is a deficient number, since it is larger than the sum of its proper divisors (28204869).

53644731 is a wasteful number, since it uses less digits than its factorization.

53644731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298.

The product of its digits is 30240, while the sum is 33.

The square root of 53644731 is about 7324.2563445035. The cubic root of 53644731 is about 377.1455814238.

The spelling of 53644731 in words is "fifty-three million, six hundred forty-four thousand, seven hundred thirty-one".