31442572 has 48 divisors (see below), whose sum is σ = 65620800. Its totient is φ = 12902400.

The previous prime is 31442569. The next prime is 31442591. The reversal of 31442572 is 27524413.

It is a Harshad number since it is a multiple of its sum of digits (28).

Its product of digits (6720) is a multiple of the sum of its prime divisors (560).

It is a self number, because there is not a number n which added to its sum of digits gives 31442572.

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, 69804 + ... + 70252.

It is an arithmetic number, because the mean of its divisors is an integer number (1367100).

Almost surely, 2^31442572 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 31442572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32810400).

31442572 is an abundant number, since it is smaller than the sum of its proper divisors (34178228).

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

31442572 is a wasteful number, since it uses less digits than its factorization.

31442572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 31442572 is about 5607.3676533646. The cubic root of 31442572 is about 315.6259393757.

Adding to 31442572 its reverse (27524413), we get a palindrome (58966985).

The spelling of 31442572 in words is "thirty-one million, four hundred forty-two thousand, five hundred seventy-two".