31001233223 has 2 divisors, whose sum is σ = 31001233224. Its totient is φ = 31001233222.

The previous prime is 31001233217. The next prime is 31001233231. The reversal of 31001233223 is 32233210013.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31001233223 is a prime.

It is a super-2 number, since 2×31001233223² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31001233195 and 31001233204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31001233723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500616611 + 15500616612.

It is an arithmetic number, because the mean of its divisors is an integer number (15500616612).

Almost surely, 2^31001233223 is an apocalyptic number.

31001233223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31001233223 is an equidigital number, since it uses as much as digits as its factorization.

31001233223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31001233223 its reverse (32233210013), we get a palindrome (63234443236).

The spelling of 31001233223 in words is "thirty-one billion, one million, two hundred thirty-three thousand, two hundred twenty-three".