1312216572 has 24 divisors (see below), whose sum is σ = 3063800656. Its totient is φ = 437125248.

The previous prime is 1312216571. The next prime is 1312216597. The reversal of 1312216572 is 2756122131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312216571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15073 + ... + 53400.

Almost surely, 2^1312216572 is an apocalyptic number.

1312216572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312216572 is an abundant number, since it is smaller than the sum of its proper divisors (1751584084).

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

1312216572 is a wasteful number, since it uses less digits than its factorization.

1312216572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70077 (or 70075 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 1312216572 is about 36224.5299762468. The cubic root of 1312216572 is about 1094.8009679745.

The spelling of 1312216572 in words is "one billion, three hundred twelve million, two hundred sixteen thousand, five hundred seventy-two".