31001213023 has 16 divisors (see below), whose sum is σ = 34299117216. Its totient is φ = 27783613440.

The previous prime is 31001212993. The next prime is 31001213057. The reversal of 31001213023 is 32031210013.

It is not a de Polignac number, because 31001213023 - 2¹³ = 31001204831 is a prime.

It is a super-2 number, since 2×31001213023² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31001212988 and 31001213006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001213323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1932865 + ... + 1948837.

It is an arithmetic number, because the mean of its divisors is an integer number (2143694826).

Almost surely, 2^31001213023 is an apocalyptic number.

31001213023 is a deficient number, since it is larger than the sum of its proper divisors (3297904193).

31001213023 is a wasteful number, since it uses less digits than its factorization.

31001213023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18474.

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

Adding to 31001213023 its reverse (32031210013), we get a palindrome (63032423036).

The spelling of 31001213023 in words is "thirty-one billion, one million, two hundred thirteen thousand, twenty-three".