31213311023 has 8 divisors (see below), whose sum is σ = 33052234320. Its totient is φ = 29374704000.

The previous prime is 31213311007. The next prime is 31213311043. The reversal of 31213311023 is 32011331213.

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 31213311023 - 2⁴ = 31213311007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31213310986 and 31213311004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213311043) 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, 141773 + ... + 287273.

It is an arithmetic number, because the mean of its divisors is an integer number (4131529290).

Almost surely, 2^31213311023 is an apocalyptic number.

31213311023 is a deficient number, since it is larger than the sum of its proper divisors (1838923297).

31213311023 is a wasteful number, since it uses less digits than its factorization.

31213311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158137.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31213311023 its reverse (32011331213), we get a palindrome (63224642236).

The spelling of 31213311023 in words is "thirty-one billion, two hundred thirteen million, three hundred eleven thousand, twenty-three".