53664331 has 4 divisors (see below), whose sum is σ = 61330672. Its totient is φ = 45997992.

The previous prime is 53664269. The next prime is 53664349. The reversal of 53664331 is 13346635.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13346635 = 5 ⋅2669327.

It is a cyclic number.

It is not a de Polignac number, because 53664331 - 2¹⁵ = 53631563 is a prime.

It is a super-2 number, since 2×53664331² = 5759720843355122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53664293 and 53664302.

It is not an unprimeable number, because it can be changed into a prime (53664931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3833160 + ... + 3833173.

It is an arithmetic number, because the mean of its divisors is an integer number (15332668).

Almost surely, 2^53664331 is an apocalyptic number.

53664331 is a deficient number, since it is larger than the sum of its proper divisors (7666341).

53664331 is an equidigital number, since it uses as much as digits as its factorization.

53664331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666340.

The product of its digits is 19440, while the sum is 31.

The square root of 53664331 is about 7325.5942421076. The cubic root of 53664331 is about 377.1915079803.

The spelling of 53664331 in words is "fifty-three million, six hundred sixty-four thousand, three hundred thirty-one".