1331431031 has 8 divisors (see below), whose sum is σ = 1523811744. Its totient is φ = 1139594400.

The previous prime is 1331431027. The next prime is 1331431033. The reversal of 1331431031 is 1301341331.

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

It is not a de Polignac number, because 1331431031 - 2² = 1331431027 is a prime.

It is a super-2 number, since 2×1331431031² = 3545417180619445922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331430994 and 1331431012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331431033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130760 + ... + 140573.

It is an arithmetic number, because the mean of its divisors is an integer number (190476468).

Almost surely, 2^1331431031 is an apocalyptic number.

1331431031 is a deficient number, since it is larger than the sum of its proper divisors (192380713).

1331431031 is an equidigital number, since it uses as much as digits as its factorization.

1331431031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272041.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1331431031 is about 36488.7795219298. The cubic root of 1331431031 is about 1100.1187285069.

Adding to 1331431031 its reverse (1301341331), we get a palindrome (2632772362).

The spelling of 1331431031 in words is "one billion, three hundred thirty-one million, four hundred thirty-one thousand, thirty-one".