31124424331 has 32 divisors (see below), whose sum is σ = 42195299328. Its totient is φ = 22169773440.

The previous prime is 31124424311. The next prime is 31124424391. The reversal of 31124424331 is 13342442113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31124424331 - 2¹³ = 31124416139 is a prime.

It is a super-2 number, since 2×31124424331² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31124424331.

It is not an unprimeable number, because it can be changed into a prime (31124424311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47836 + ... + 254041.

It is an arithmetic number, because the mean of its divisors is an integer number (1318603104).

Almost surely, 2^31124424331 is an apocalyptic number.

31124424331 is a deficient number, since it is larger than the sum of its proper divisors (11070874997).

31124424331 is a wasteful number, since it uses less digits than its factorization.

31124424331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302011.

The product of its digits is 6912, while the sum is 28.

Adding to 31124424331 its reverse (13342442113), we get a palindrome (44466866444).

The spelling of 31124424331 in words is "thirty-one billion, one hundred twenty-four million, four hundred twenty-four thousand, three hundred thirty-one".