31442120 has 16 divisors (see below), whose sum is σ = 70744860. Its totient is φ = 12576832.

The previous prime is 31442113. The next prime is 31442141. The reversal of 31442120 is 2124413.

It can be written as a sum of positive squares in 2 ways, for example, as 31427236 + 14884 = 5606^2 + 122^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392987 + ... + 393066.

Almost surely, 2^31442120 is an apocalyptic number.

It is an amenable number.

31442120 is an abundant number, since it is smaller than the sum of its proper divisors (39302740).

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

31442120 is a wasteful number, since it uses less digits than its factorization.

31442120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786064 (or 786060 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31442120 is about 5607.3273491031. The cubic root of 31442120 is about 315.6244269506.

Adding to 31442120 its reverse (2124413), we get a palindrome (33566533).

The spelling of 31442120 in words is "thirty-one million, four hundred forty-two thousand, one hundred twenty".