53213431 has 4 divisors (see below), whose sum is σ = 54217512. Its totient is φ = 52209352.

The previous prime is 53213429. The next prime is 53213497. The reversal of 53213431 is 13431235.

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

It is a cyclic number.

It is not a de Polignac number, because 53213431 - 2¹ = 53213429 is a prime.

It is a super-2 number, since 2×53213431² = 5663338477583522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53213401) 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, 501961 + ... + 502066.

It is an arithmetic number, because the mean of its divisors is an integer number (13554378).

Almost surely, 2^53213431 is an apocalyptic number.

53213431 is a deficient number, since it is larger than the sum of its proper divisors (1004081).

53213431 is a wasteful number, since it uses less digits than its factorization.

53213431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004080.

The product of its digits is 1080, while the sum is 22.

The square root of 53213431 is about 7294.7536627360. The cubic root of 53213431 is about 376.1321188604.

Adding to 53213431 its reverse (13431235), we get a palindrome (66644666).

The spelling of 53213431 in words is "fifty-three million, two hundred thirteen thousand, four hundred thirty-one".