31020232223 has 4 divisors (see below), whose sum is σ = 31062208920. Its totient is φ = 30978255528.

The previous prime is 31020232183. The next prime is 31020232237. The reversal of 31020232223 is 32223202013.

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-31020232223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020232195 and 31020232204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31028232223) 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, 20987240 + ... + 20988717.

It is an arithmetic number, because the mean of its divisors is an integer number (7765552230).

Almost surely, 2^31020232223 is an apocalyptic number.

31020232223 is a deficient number, since it is larger than the sum of its proper divisors (41976697).

31020232223 is an equidigital number, since it uses as much as digits as its factorization.

31020232223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41976696.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31020232223 its reverse (32223202013), we get a palindrome (63243434236).

The spelling of 31020232223 in words is "thirty-one billion, twenty million, two hundred thirty-two thousand, two hundred twenty-three".