1312031451252 has 48 divisors (see below), whose sum is σ = 3241830090240. Its totient is φ = 411844717152.

The previous prime is 1312031451251. The next prime is 1312031451277. The reversal of 1312031451252 is 2521541302131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312031451251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17191038 + ... + 17267189.

It is an arithmetic number, because the mean of its divisors is an integer number (67538126880).

Almost surely, 2^{1312031451252} is an apocalyptic number.

1312031451252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312031451252 is an abundant number, since it is smaller than the sum of its proper divisors (1929798638988).

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

1312031451252 is a wasteful number, since it uses less digits than its factorization.

1312031451252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34458420 (or 34458418 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1312031451252 its reverse (2521541302131), we get a palindrome (3833572753383).

The spelling of 1312031451252 in words is "one trillion, three hundred twelve billion, thirty-one million, four hundred fifty-one thousand, two hundred fifty-two".