31442272 has 12 divisors (see below), whose sum is σ = 61902036. Its totient is φ = 15721120.

The previous prime is 31442269. The next prime is 31442273. The reversal of 31442272 is 27224413.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491254 + ... + 491317.

It is an arithmetic number, because the mean of its divisors is an integer number (5158503).

Almost surely, 2^31442272 is an apocalyptic number.

31442272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31442272 is a deficient number, since it is larger than the sum of its proper divisors (30459764).

31442272 is an equidigital number, since it uses as much as digits as its factorization.

31442272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982581 (or 982573 counting only the distinct ones).

The product of its digits is 2688, while the sum is 25.

The square root of 31442272 is about 5607.3409027809. The cubic root of 31442272 is about 315.6249355553.

Adding to 31442272 its reverse (27224413), we get a palindrome (58666685).

The spelling of 31442272 in words is "thirty-one million, four hundred forty-two thousand, two hundred seventy-two".