53131431 has 4 divisors (see below), whose sum is σ = 70841912. Its totient is φ = 35420952.

The previous prime is 53131423. The next prime is 53131433. The reversal of 53131431 is 13413135.

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

It is not a de Polignac number, because 53131431 - 2³ = 53131423 is a prime.

It is a super-2 number, since 2×53131431² = 5645897920215522, 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 = 53131398 and 53131407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53131433) 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, 8855236 + ... + 8855241.

It is an arithmetic number, because the mean of its divisors is an integer number (17710478).

Almost surely, 2^53131431 is an apocalyptic number.

53131431 is a deficient number, since it is larger than the sum of its proper divisors (17710481).

53131431 is a wasteful number, since it uses less digits than its factorization.

53131431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17710480.

The product of its digits is 540, while the sum is 21.

The square root of 53131431 is about 7289.1310181667. The cubic root of 53131431 is about 375.9388174744.

Adding to 53131431 its reverse (13413135), we get a palindrome (66544566).

The spelling of 53131431 in words is "fifty-three million, one hundred thirty-one thousand, four hundred thirty-one".