31222960 has 80 divisors (see below), whose sum is σ = 77137920. Its totient is φ = 11728640.

The previous prime is 31222957. The next prime is 31222973. The reversal of 31222960 is 6922213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130521 + ... + 130759.

It is an arithmetic number, because the mean of its divisors is an integer number (964224).

Almost surely, 2^31222960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31222960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38568960).

31222960 is an abundant number, since it is smaller than the sum of its proper divisors (45914960).

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

31222960 is a wasteful number, since it uses less digits than its factorization.

31222960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 31222960 is about 5587.7508892219. The cubic root of 31222960 is about 314.8893875508.

The spelling of 31222960 in words is "thirty-one million, two hundred twenty-two thousand, nine hundred sixty".