312132013 has 4 divisors (see below), whose sum is σ = 316407868. Its totient is φ = 307856160.

The previous prime is 312132001. The next prime is 312132043. The reversal of 312132013 is 310231213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65076489 + 247055524 = 8067^2 + 15718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312132013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312132043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2137818 + ... + 2137963.

It is an arithmetic number, because the mean of its divisors is an integer number (79101967).

Almost surely, 2^312132013 is an apocalyptic number.

It is an amenable number.

312132013 is a deficient number, since it is larger than the sum of its proper divisors (4275855).

312132013 is an equidigital number, since it uses as much as digits as its factorization.

312132013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275854.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 312132013 is about 17667.2582196559. The cubic root of 312132013 is about 678.3379340879.

Adding to 312132013 its reverse (310231213), we get a palindrome (622363226).

The spelling of 312132013 in words is "three hundred twelve million, one hundred thirty-two thousand, thirteen".