31445132 has 12 divisors (see below), whose sum is σ = 55204800. Its totient is φ = 15672336.

The previous prime is 31445111. The next prime is 31445137. The reversal of 31445132 is 23154413.

It is a junction number, because it is equal to n+sod(n) for n = 31445098 and 31445107.

It is not an unprimeable number, because it can be changed into a prime (31445137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11132 + ... + 13667.

It is an arithmetic number, because the mean of its divisors is an integer number (4600400).

Almost surely, 2^31445132 is an apocalyptic number.

It is an amenable number.

31445132 is a deficient number, since it is larger than the sum of its proper divisors (23759668).

31445132 is a wasteful number, since it uses less digits than its factorization.

31445132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25120 (or 25118 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 31445132 is about 5607.5959198216. The cubic root of 31445132 is about 315.6345050498.

Adding to 31445132 its reverse (23154413), we get a palindrome (54599545).

The spelling of 31445132 in words is "thirty-one million, four hundred forty-five thousand, one hundred thirty-two".