31021412 has 6 divisors (see below), whose sum is σ = 54287478. Its totient is φ = 15510704.

The previous prime is 31021399. The next prime is 31021427. The reversal of 31021412 is 21412013.

It can be written as a sum of positive squares in only one way, i.e., 24344356 + 6677056 = 4934^2 + 2584^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3877673 + ... + 3877680.

It is an arithmetic number, because the mean of its divisors is an integer number (9047913).

Almost surely, 2^31021412 is an apocalyptic number.

It is an amenable number.

31021412 is a deficient number, since it is larger than the sum of its proper divisors (23266066).

31021412 is a wasteful number, since it uses less digits than its factorization.

31021412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7755357 (or 7755355 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31021412 is about 5569.6868852746. The cubic root of 31021412 is about 314.2103746607.

Adding to 31021412 its reverse (21412013), we get a palindrome (52433425).

The spelling of 31021412 in words is "thirty-one million, twenty-one thousand, four hundred twelve".