31012241431 has 4 divisors (see below), whose sum is σ = 31733456392. Its totient is φ = 30291026472.

The previous prime is 31012241423. The next prime is 31012241459. The reversal of 31012241431 is 13414221013.

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 31012241431 - 2³ = 31012241423 is a prime.

It is a super-2 number, since 2×31012241431² (a number of 22 digits) 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 (31012241131) 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, 360607416 + ... + 360607501.

It is an arithmetic number, because the mean of its divisors is an integer number (7933364098).

Almost surely, 2^31012241431 is an apocalyptic number.

31012241431 is a deficient number, since it is larger than the sum of its proper divisors (721214961).

31012241431 is an equidigital number, since it uses as much as digits as its factorization.

31012241431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721214960.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31012241431 its reverse (13414221013), we get a palindrome (44426462444).

The spelling of 31012241431 in words is "thirty-one billion, twelve million, two hundred forty-one thousand, four hundred thirty-one".