31379922 has 96 divisors (see below), whose sum is σ = 81948672. Its totient is φ = 8491392.

The previous prime is 31379899. The next prime is 31379923. The reversal of 31379922 is 22997313.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31379923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 247023 + ... + 247149.

It is an arithmetic number, because the mean of its divisors is an integer number (853632).

Almost surely, 2^31379922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31379922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40974336).

31379922 is an abundant number, since it is smaller than the sum of its proper divisors (50568750).

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

31379922 is a wasteful number, since it uses less digits than its factorization.

31379922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 229 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 31379922 is about 5601.7784675940. The cubic root of 31379922 is about 315.4161695027.

The spelling of 31379922 in words is "thirty-one million, three hundred seventy-nine thousand, nine hundred twenty-two".