31415212 has 6 divisors (see below), whose sum is σ = 54976628. Its totient is φ = 15707604.

The previous prime is 31415203. The next prime is 31415213. The reversal of 31415212 is 21251413.

It is a self number, because there is not a number n which added to its sum of digits gives 31415212.

It is not an unprimeable number, because it can be changed into a prime (31415213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3926898 + ... + 3926905.

Almost surely, 2^31415212 is an apocalyptic number.

It is an amenable number.

31415212 is a deficient number, since it is larger than the sum of its proper divisors (23561416).

31415212 is a wasteful number, since it uses less digits than its factorization.

31415212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7853807 (or 7853805 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 31415212 is about 5604.9274749991. The cubic root of 31415212 is about 315.5343646823.

Adding to 31415212 its reverse (21251413), we get a palindrome (52666625).

The spelling of 31415212 in words is "thirty-one million, four hundred fifteen thousand, two hundred twelve".