31020323313 has 32 divisors (see below), whose sum is σ = 48564117504. Its totient is φ = 17244775872.

The previous prime is 31020323287. The next prime is 31020323333. The reversal of 31020323313 is 31332302013.

It is not a de Polignac number, because 31020323313 - 2¹² = 31020319217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31020323313.

It is not an unprimeable number, because it can be changed into a prime (31020323333) 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 31 ways as a sum of consecutive naturals, for example, 70731 + ... + 258927.

It is an arithmetic number, because the mean of its divisors is an integer number (1517628672).

Almost surely, 2^31020323313 is an apocalyptic number.

It is an amenable number.

31020323313 is a deficient number, since it is larger than the sum of its proper divisors (17543794191).

31020323313 is a wasteful number, since it uses less digits than its factorization.

31020323313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188421.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31020323313 its reverse (31332302013), we get a palindrome (62352625326).

The spelling of 31020323313 in words is "thirty-one billion, twenty million, three hundred twenty-three thousand, three hundred thirteen".