1310561015 has 4 divisors (see below), whose sum is σ = 1572673224. Its totient is φ = 1048448808.

The previous prime is 1310561003. The next prime is 1310561029. The reversal of 1310561015 is 5101650131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1310561015 - 2⁸ = 1310560759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131056097 + ... + 131056106.

It is an arithmetic number, because the mean of its divisors is an integer number (393168306).

Almost surely, 2^1310561015 is an apocalyptic number.

1310561015 is a deficient number, since it is larger than the sum of its proper divisors (262112209).

1310561015 is an equidigital number, since it uses as much as digits as its factorization.

1310561015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262112208.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 1310561015 is about 36201.6714393134. The cubic root of 1310561015 is about 1094.3403559515.

The spelling of 1310561015 in words is "one billion, three hundred ten million, five hundred sixty-one thousand, fifteen".