31220023332 has 48 divisors (see below), whose sum is σ = 74262992832. Its totient is φ = 10204571520.

The previous prime is 31220023301. The next prime is 31220023361. The reversal of 31220023332 is 23332002213.

It is a junction number, because it is equal to n+sod(n) for n = 31220023299 and 31220023308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1199982 + ... + 1225722.

It is an arithmetic number, because the mean of its divisors is an integer number (1547145684).

Almost surely, 2^31220023332 is an apocalyptic number.

It is an amenable number.

31220023332 is an abundant number, since it is smaller than the sum of its proper divisors (43042969500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220023332 is a wasteful number, since it uses less digits than its factorization.

31220023332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27708 (or 27706 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 31220023332 its reverse (23332002213), we get a palindrome (54552025545).

The spelling of 31220023332 in words is "thirty-one billion, two hundred twenty million, twenty-three thousand, three hundred thirty-two".