1312531263252 has 108 divisors (see below), whose sum is σ = 3692987421760. Its totient is φ = 392702001120.

The previous prime is 1312531263247. The next prime is 1312531263259. The reversal of 1312531263252 is 2523621352131.

1312531263252 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 5 + 3 + 12 + 632 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312531263259) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1562938 + ... + 2251185.

Almost surely, 2^{1312531263252} is an apocalyptic number.

1312531263252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312531263252 is an abundant number, since it is smaller than the sum of its proper divisors (2380456158508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312531263252 is a wasteful number, since it uses less digits than its factorization.

1312531263252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814234 (or 3814218 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The spelling of 1312531263252 in words is "one trillion, three hundred twelve billion, five hundred thirty-one million, two hundred sixty-three thousand, two hundred fifty-two".