31142312 has 8 divisors (see below), whose sum is σ = 58391850. Its totient is φ = 15571152.

The previous prime is 31142303. The next prime is 31142381. The reversal of 31142312 is 21324113.

It can be written as a sum of positive squares in only one way, i.e., 26275876 + 4866436 = 5126^2 + 2206^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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, 1946387 + ... + 1946402.

Almost surely, 2^31142312 is an apocalyptic number.

It is an amenable number.

31142312 is a deficient number, since it is larger than the sum of its proper divisors (27249538).

31142312 is a wasteful number, since it uses less digits than its factorization.

31142312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892795 (or 3892791 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 31142312 is about 5580.5297239599. The cubic root of 31142312 is about 314.6180370683.

Adding to 31142312 its reverse (21324113), we get a palindrome (52466425).

The spelling of 31142312 in words is "thirty-one million, one hundred forty-two thousand, three hundred twelve".