31313145223 has 8 divisors (see below), whose sum is σ = 33243989328. Its totient is φ = 29392178304.

The previous prime is 31313145181. The next prime is 31313145247. The reversal of 31313145223 is 32254131313.

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 31313145223 - 2⁹ = 31313144711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31313145191 and 31313145200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313145023) 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, 2462761 + ... + 2475442.

It is an arithmetic number, because the mean of its divisors is an integer number (4155498666).

Almost surely, 2^31313145223 is an apocalyptic number.

31313145223 is a deficient number, since it is larger than the sum of its proper divisors (1930844105).

31313145223 is a wasteful number, since it uses less digits than its factorization.

31313145223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938593.

The product of its digits is 6480, while the sum is 28.

Adding to 31313145223 its reverse (32254131313), we get a palindrome (63567276536).

The spelling of 31313145223 in words is "thirty-one billion, three hundred thirteen million, one hundred forty-five thousand, two hundred twenty-three".