312231013 has 4 divisors (see below), whose sum is σ = 313816140. Its totient is φ = 310645888.

The previous prime is 312230987. The next prime is 312231019. The reversal of 312231013 is 310132213.

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 255936004 + 56295009 = 15998^2 + 7503^2 .

It is a cyclic number.

It is not a de Polignac number, because 312231013 - 2⁵ = 312230981 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 (312231019) 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, 792268 + ... + 792661.

It is an arithmetic number, because the mean of its divisors is an integer number (78454035).

Almost surely, 2^312231013 is an apocalyptic number.

It is an amenable number.

312231013 is a deficient number, since it is larger than the sum of its proper divisors (1585127).

312231013 is a wasteful number, since it uses less digits than its factorization.

312231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585126.

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

The square root of 312231013 is about 17670.0597905044. The cubic root of 312231013 is about 678.4096434437.

Adding to 312231013 its reverse (310132213), we get a palindrome (622363226).

The spelling of 312231013 in words is "three hundred twelve million, two hundred thirty-one thousand, thirteen".