65423631 has 32 divisors (see below), whose sum is σ = 113021440. Its totient is φ = 32690304.

The previous prime is 65423591. The next prime is 65423641. The reversal of 65423631 is 13632456.

It is not a de Polignac number, because 65423631 - 2⁹ = 65423119 is a prime.

It is a super-2 number, since 2×65423631² = 8560502986448322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65423641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1120 + ... + 11493.

It is an arithmetic number, because the mean of its divisors is an integer number (3531920).

Almost surely, 2^65423631 is an apocalyptic number.

65423631 is a deficient number, since it is larger than the sum of its proper divisors (47597809).

65423631 is a wasteful number, since it uses less digits than its factorization.

65423631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12655.

The product of its digits is 12960, while the sum is 30.

The square root of 65423631 is about 8088.4875594885. The cubic root of 65423631 is about 402.9441743424.

The spelling of 65423631 in words is "sixty-five million, four hundred twenty-three thousand, six hundred thirty-one".