31445012 has 12 divisors (see below), whose sum is σ = 55931316. Its totient is φ = 15464640.

The previous prime is 31445009. The next prime is 31445017. The reversal of 31445012 is 21054413.

It can be written as a sum of positive squares in 2 ways, for example, as 10523536 + 20921476 = 3244^2 + 4574^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31445017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64193 + ... + 64680.

It is an arithmetic number, because the mean of its divisors is an integer number (4660943).

Almost surely, 2^31445012 is an apocalyptic number.

It is an amenable number.

31445012 is a deficient number, since it is larger than the sum of its proper divisors (24486304).

31445012 is a wasteful number, since it uses less digits than its factorization.

31445012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128938 (or 128936 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 31445012 is about 5607.5852200390. The cubic root of 31445012 is about 315.6341035442.

Adding to 31445012 its reverse (21054413), we get a palindrome (52499425).

The spelling of 31445012 in words is "thirty-one million, four hundred forty-five thousand, twelve".