1320311031 has 16 divisors (see below), whose sum is σ = 1898018304. Its totient is φ = 811561824.

The previous prime is 1320311017. The next prime is 1320311039. The reversal of 1320311031 is 1301130231.

It is not a de Polignac number, because 1320311031 - 2¹⁰ = 1320310007 is a prime.

It is a super-2 number, since 2×1320311031² = 3486442437160565922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320311031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320311039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15510 + ... + 53676.

It is an arithmetic number, because the mean of its divisors is an integer number (118626144).

Almost surely, 2^1320311031 is an apocalyptic number.

1320311031 is a deficient number, since it is larger than the sum of its proper divisors (577707273).

1320311031 is a wasteful number, since it uses less digits than its factorization.

1320311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39070.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1320311031 is about 36336.0844203114. The cubic root of 1320311031 is about 1097.0474625519.

Adding to 1320311031 its reverse (1301130231), we get a palindrome (2621441262).

The spelling of 1320311031 in words is "one billion, three hundred twenty million, three hundred eleven thousand, thirty-one".