5681431231 has 4 divisors (see below), whose sum is σ = 6493064272. Its totient is φ = 4869798192.

The previous prime is 5681431207. The next prime is 5681431241. The reversal of 5681431231 is 1321341865.

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

It is not a de Polignac number, because 5681431231 - 2⁵ = 5681431199 is a prime.

It is a super-2 number, since 2×5681431231² = 64557321665164350722, 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 (5681431241) 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, 405816510 + ... + 405816523.

It is an arithmetic number, because the mean of its divisors is an integer number (1623266068).

Almost surely, 2^5681431231 is an apocalyptic number.

5681431231 is a deficient number, since it is larger than the sum of its proper divisors (811633041).

5681431231 is an equidigital number, since it uses as much as digits as its factorization.

5681431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811633040.

The product of its digits is 17280, while the sum is 34.

The square root of 5681431231 is about 75375.2693593860. The cubic root of 5681431231 is about 1784.3741296381.

The spelling of 5681431231 in words is "five billion, six hundred eighty-one million, four hundred thirty-one thousand, two hundred thirty-one".