31350813213 has 16 divisors (see below), whose sum is σ = 42743264256. Its totient is φ = 20430552240.

The previous prime is 31350813209. The next prime is 31350813217. The reversal of 31350813213 is 31231805313.

It is an interprime number because it is at equal distance from previous prime (31350813209) and next prime (31350813217).

It is not a de Polignac number, because 31350813213 - 2² = 31350813209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31350813217) 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 15 ways as a sum of consecutive naturals, for example, 22731 + ... + 251432.

It is an arithmetic number, because the mean of its divisors is an integer number (2671454016).

Almost surely, 2^31350813213 is an apocalyptic number.

It is an amenable number.

31350813213 is a deficient number, since it is larger than the sum of its proper divisors (11392451043).

31350813213 is a wasteful number, since it uses less digits than its factorization.

31350813213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275024.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 31350813213 in words is "thirty-one billion, three hundred fifty million, eight hundred thirteen thousand, two hundred thirteen".