1315653431 has 4 divisors (see below), whose sum is σ = 1315793664. Its totient is φ = 1315513200.

The previous prime is 1315653421. The next prime is 1315653497. The reversal of 1315653431 is 1343565131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315653431 is a prime.

It is a super-2 number, since 2×1315653431² = 3461887901004143522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315653421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54950 + ... + 75171.

It is an arithmetic number, because the mean of its divisors is an integer number (328948416).

Almost surely, 2^1315653431 is an apocalyptic number.

1315653431 is a deficient number, since it is larger than the sum of its proper divisors (140233).

1315653431 is a wasteful number, since it uses less digits than its factorization.

1315653431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140232.

The product of its digits is 16200, while the sum is 32.

The square root of 1315653431 is about 36271.9372380357. The cubic root of 1315653431 is about 1095.7559415255.

The spelling of 1315653431 in words is "one billion, three hundred fifteen million, six hundred fifty-three thousand, four hundred thirty-one".