31012332223 has 4 divisors (see below), whose sum is σ = 31016597688. Its totient is φ = 31008066760.

The previous prime is 31012332173. The next prime is 31012332259. The reversal of 31012332223 is 32223321013.

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

It is a cyclic number.

It is not a de Polignac number, because 31012332223 - 2²¹ = 31010235071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31012332194 and 31012332203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012332023) 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, 2121808 + ... + 2136373.

It is an arithmetic number, because the mean of its divisors is an integer number (7754149422).

Almost surely, 2^31012332223 is an apocalyptic number.

31012332223 is a deficient number, since it is larger than the sum of its proper divisors (4265465).

31012332223 is an equidigital number, since it uses as much as digits as its factorization.

31012332223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265464.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31012332223 its reverse (32223321013), we get a palindrome (63235653236).

The spelling of 31012332223 in words is "thirty-one billion, twelve million, three hundred thirty-two thousand, two hundred twenty-three".