31445412 has 24 divisors (see below), whose sum is σ = 75356736. Its totient is φ = 10198368.

The previous prime is 31445387. The next prime is 31445417. The reversal of 31445412 is 21454413.

It is not an unprimeable number, because it can be changed into a prime (31445417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34968 + ... + 35855.

It is an arithmetic number, because the mean of its divisors is an integer number (3139864).

Almost surely, 2^31445412 is an apocalyptic number.

It is an amenable number.

31445412 is an abundant number, since it is smaller than the sum of its proper divisors (43911324).

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

31445412 is a wasteful number, since it uses less digits than its factorization.

31445412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70867 (or 70865 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 31445412 is about 5607.6208859016. The cubic root of 31445412 is about 315.6354418922.

Adding to 31445412 its reverse (21454413), we get a palindrome (52899825).

Subtracting from 31445412 its reverse (21454413), we obtain a palindrome (9990999).

The spelling of 31445412 in words is "thirty-one million, four hundred forty-five thousand, four hundred twelve".