31124144431 has 8 divisors (see below), whose sum is σ = 31179788640. Its totient is φ = 31068536928.

The previous prime is 31124144413. The next prime is 31124144449. The reversal of 31124144431 is 13444142113.

It is an interprime number because it is at equal distance from previous prime (31124144413) and next prime (31124144449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31124144431 - 2¹⁷ = 31124013359 is a prime.

It is a super-2 number, since 2×31124144431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31124144431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31124144461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2107485 + ... + 2122201.

It is an arithmetic number, because the mean of its divisors is an integer number (3897473580).

Almost surely, 2^31124144431 is an apocalyptic number.

31124144431 is a deficient number, since it is larger than the sum of its proper divisors (55644209).

31124144431 is a wasteful number, since it uses less digits than its factorization.

31124144431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18353.

The product of its digits is 4608, while the sum is 28.

Adding to 31124144431 its reverse (13444142113), we get a palindrome (44568286544).

The spelling of 31124144431 in words is "thirty-one billion, one hundred twenty-four million, one hundred forty-four thousand, four hundred thirty-one".