31145412 has 12 divisors (see below), whose sum is σ = 72672656. Its totient is φ = 10381800.

The previous prime is 31145383. The next prime is 31145423. The reversal of 31145412 is 21454113.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1297714 + ... + 1297737.

Almost surely, 2^31145412 is an apocalyptic number.

It is an amenable number.

31145412 is an abundant number, since it is smaller than the sum of its proper divisors (41527244).

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

31145412 is a wasteful number, since it uses less digits than its factorization.

31145412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595458 (or 2595456 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 31145412 is about 5580.8074684583. The cubic root of 31145412 is about 314.6284760658.

Adding to 31145412 its reverse (21454113), we get a palindrome (52599525).

The spelling of 31145412 in words is "thirty-one million, one hundred forty-five thousand, four hundred twelve".