31031001213 has 16 divisors (see below), whose sum is σ = 42773349696. Its totient is φ = 19997913600.

The previous prime is 31031001203. The next prime is 31031001277. The reversal of 31031001213 is 31210013013.

It is not a de Polignac number, because 31031001213 - 2²⁰ = 31029952637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31031001192 and 31031001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031001203) 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, 1227438 + ... + 1252463.

It is an arithmetic number, because the mean of its divisors is an integer number (2673334356).

Almost surely, 2^31031001213 is an apocalyptic number.

It is an amenable number.

31031001213 is a deficient number, since it is larger than the sum of its proper divisors (11742348483).

31031001213 is a wasteful number, since it uses less digits than its factorization.

31031001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480044.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31031001213 its reverse (31210013013), we get a palindrome (62241014226).

The spelling of 31031001213 in words is "thirty-one billion, thirty-one million, one thousand, two hundred thirteen".