31230012013 has 2 divisors, whose sum is σ = 31230012014. Its totient is φ = 31230012012.

The previous prime is 31230011999. The next prime is 31230012049. The reversal of 31230012013 is 31021003213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29370418884 + 1859593129 = 171378^2 + 43123^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230012013 - 2¹³ = 31230003821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31230012113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615006006 + 15615006007.

It is an arithmetic number, because the mean of its divisors is an integer number (15615006007).

Almost surely, 2^31230012013 is an apocalyptic number.

It is an amenable number.

31230012013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230012013 is an equidigital number, since it uses as much as digits as its factorization.

31230012013 is an evil number, because the sum of its binary digits is even.

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

Adding to 31230012013 its reverse (31021003213), we get a palindrome (62251015226).

The spelling of 31230012013 in words is "thirty-one billion, two hundred thirty million, twelve thousand, thirteen".