31232220233 has 8 divisors (see below), whose sum is σ = 31422631680. Its totient is φ = 31042131120.

The previous prime is 31232220221. The next prime is 31232220241. The reversal of 31232220233 is 33202223213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31232220233 is a prime.

It is a super-2 number, since 2×31232220233² (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 = 31232220199 and 31232220208.

It is not an unprimeable number, because it can be changed into a prime (31232220433) 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, 115238 + ... + 275216.

It is an arithmetic number, because the mean of its divisors is an integer number (3927828960).

Almost surely, 2^31232220233 is an apocalyptic number.

It is an amenable number.

31232220233 is a deficient number, since it is larger than the sum of its proper divisors (190411447).

31232220233 is a wasteful number, since it uses less digits than its factorization.

31232220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161167.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 31232220233 its reverse (33202223213), we get a palindrome (64434443446).

The spelling of 31232220233 in words is "thirty-one billion, two hundred thirty-two million, two hundred twenty thousand, two hundred thirty-three".