53040431 has 4 divisors (see below), whose sum is σ = 53247072. Its totient is φ = 52833792.

The previous prime is 53040397. The next prime is 53040443. The reversal of 53040431 is 13404035.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13404035 = 5 ⋅2680807.

It is a cyclic number.

It is not a de Polignac number, because 53040431 - 2⁶ = 53040367 is a prime.

It is a super-2 number, since 2×53040431² = 5626574641331522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53040131) 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, 102935 + ... + 103448.

It is an arithmetic number, because the mean of its divisors is an integer number (13311768).

Almost surely, 2^53040431 is an apocalyptic number.

53040431 is a deficient number, since it is larger than the sum of its proper divisors (206641).

53040431 is a wasteful number, since it uses less digits than its factorization.

53040431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206640.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 53040431 is about 7282.8861723907. The cubic root of 53040431 is about 375.7240671124.

Adding to 53040431 its reverse (13404035), we get a palindrome (66444466).

The spelling of 53040431 in words is "fifty-three million, forty thousand, four hundred thirty-one".