1312253531 has 2 divisors, whose sum is σ = 1312253532. Its totient is φ = 1312253530.

The previous prime is 1312253497. The next prime is 1312253543. The reversal of 1312253531 is 1353522131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312253531 - 2¹⁰ = 1312252507 is a prime.

It is a super-2 number, since 2×1312253531² = 3444018659243935922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312253531.

It is not a weakly prime, because it can be changed into another prime (1312252531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656126765 + 656126766.

It is an arithmetic number, because the mean of its divisors is an integer number (656126766).

Almost surely, 2^1312253531 is an apocalyptic number.

1312253531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312253531 is an equidigital number, since it uses as much as digits as its factorization.

1312253531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 1312253531 is about 36225.0401103988. The cubic root of 1312253531 is about 1094.8112463513.

Adding to 1312253531 its reverse (1353522131), we get a palindrome (2665775662).

The spelling of 1312253531 in words is "one billion, three hundred twelve million, two hundred fifty-three thousand, five hundred thirty-one".