1312231525 has 24 divisors (see below), whose sum is σ = 1786903488. Its totient is φ = 948000000.

The previous prime is 1312231477. The next prime is 1312231537. The reversal of 1312231525 is 5251322131.

It is not a de Polignac number, because 1312231525 - 2²⁷ = 1178013797 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312231525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25725 + ... + 57325.

It is an arithmetic number, because the mean of its divisors is an integer number (74454312).

Almost surely, 2^1312231525 is an apocalyptic number.

It is an amenable number.

1312231525 is a deficient number, since it is larger than the sum of its proper divisors (474671963).

1312231525 is a wasteful number, since it uses less digits than its factorization.

1312231525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31773 (or 31768 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 1312231525 is about 36224.7363689510. The cubic root of 1312231525 is about 1094.8051264589.

Adding to 1312231525 its reverse (5251322131), we get a palindrome (6563553656).

The spelling of 1312231525 in words is "one billion, three hundred twelve million, two hundred thirty-one thousand, five hundred twenty-five".