1231031013 has 16 divisors (see below), whose sum is σ = 1738946880. Its totient is φ = 771958016.

The previous prime is 1231030967. The next prime is 1231031023. The reversal of 1231031013 is 3101301321.

It is a cyclic number.

It is not a de Polignac number, because 1231031013 - 2¹⁷ = 1230899941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231030983 and 1231031001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231031023) 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, 94831 + ... + 107027.

It is an arithmetic number, because the mean of its divisors is an integer number (108684180).

Almost surely, 2^1231031013 is an apocalyptic number.

It is an amenable number.

1231031013 is a deficient number, since it is larger than the sum of its proper divisors (507915867).

1231031013 is a wasteful number, since it uses less digits than its factorization.

1231031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14196.

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

The square root of 1231031013 is about 35086.0515447378. The cubic root of 1231031013 is about 1071.7405546145.

Adding to 1231031013 its reverse (3101301321), we get a palindrome (4332332334).

The spelling of 1231031013 in words is "one billion, two hundred thirty-one million, thirty-one thousand, thirteen".