31213023313 has 8 divisors (see below), whose sum is σ = 31883816448. Its totient is φ = 30542508864.

The previous prime is 31213023307. The next prime is 31213023329. The reversal of 31213023313 is 31332031213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31213023313 - 2⁹ = 31213022801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213023343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165145 + ... + 299497.

It is an arithmetic number, because the mean of its divisors is an integer number (3985477056).

Almost surely, 2^31213023313 is an apocalyptic number.

It is an amenable number.

31213023313 is a deficient number, since it is larger than the sum of its proper divisors (670793135).

31213023313 is a wasteful number, since it uses less digits than its factorization.

31213023313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139343.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31213023313 its reverse (31332031213), we get a palindrome (62545054526).

The spelling of 31213023313 in words is "thirty-one billion, two hundred thirteen million, twenty-three thousand, three hundred thirteen".