31313301223 has 4 divisors (see below), whose sum is σ = 31435143120. Its totient is φ = 31191459328.

The previous prime is 31313301211. The next prime is 31313301241. The reversal of 31313301223 is 32210331313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31313301223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313301194 and 31313301203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313301023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60920563 + ... + 60921076.

It is an arithmetic number, because the mean of its divisors is an integer number (7858785780).

Almost surely, 2^31313301223 is an apocalyptic number.

31313301223 is a deficient number, since it is larger than the sum of its proper divisors (121841897).

31313301223 is a wasteful number, since it uses less digits than its factorization.

31313301223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121841896.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31313301223 its reverse (32210331313), we get a palindrome (63523632536).

The spelling of 31313301223 in words is "thirty-one billion, three hundred thirteen million, three hundred one thousand, two hundred twenty-three".