53431969 has 4 divisors (see below), whose sum is σ = 56575044. Its totient is φ = 50288896.

The previous prime is 53431957. The next prime is 53431999. The reversal of 53431969 is 96913435.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20793600 + 32638369 = 4560^2 + 5713^2 .

It is a cyclic number.

It is not a de Polignac number, because 53431969 - 2²⁵ = 19877537 is a prime.

It is a super-2 number, since 2×53431969² = 5709950622433922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53431919) 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, 1571512 + ... + 1571545.

It is an arithmetic number, because the mean of its divisors is an integer number (14143761).

Almost surely, 2^53431969 is an apocalyptic number.

It is an amenable number.

53431969 is a deficient number, since it is larger than the sum of its proper divisors (3143075).

53431969 is a wasteful number, since it uses less digits than its factorization.

53431969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143074.

The product of its digits is 87480, while the sum is 40.

The square root of 53431969 is about 7309.7174363993. The cubic root of 53431969 is about 376.6463179373.

The spelling of 53431969 in words is "fifty-three million, four hundred thirty-one thousand, nine hundred sixty-nine".