31153412 has 6 divisors (see below), whose sum is σ = 54518478. Its totient is φ = 15576704.

The previous prime is 31153403. The next prime is 31153487. The reversal of 31153412 is 21435113.

It can be written as a sum of positive squares in only one way, i.e., 30980356 + 173056 = 5566^2 + 416^2 .

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, 3894173 + ... + 3894180.

It is an arithmetic number, because the mean of its divisors is an integer number (9086413).

Almost surely, 2^31153412 is an apocalyptic number.

It is an amenable number.

31153412 is a deficient number, since it is larger than the sum of its proper divisors (23365066).

31153412 is a wasteful number, since it uses less digits than its factorization.

31153412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7788357 (or 7788355 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 31153412 is about 5581.5241645988. The cubic root of 31153412 is about 314.6554122144.

Adding to 31153412 its reverse (21435113), we get a palindrome (52588525).

The spelling of 31153412 in words is "thirty-one million, one hundred fifty-three thousand, four hundred twelve".