31012304 has 10 divisors (see below), whose sum is σ = 60086370. Its totient is φ = 15506144.

The previous prime is 31012297. The next prime is 31012309. The reversal of 31012304 is 40321013.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 6012304 = 5000^2 + 2452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012309) by changing a digit.

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, 969119 + ... + 969150.

It is an arithmetic number, because the mean of its divisors is an integer number (6008637).

Almost surely, 2^31012304 is an apocalyptic number.

It is an amenable number.

31012304 is a deficient number, since it is larger than the sum of its proper divisors (29074066).

31012304 is a wasteful number, since it uses less digits than its factorization.

31012304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938277 (or 1938271 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31012304 is about 5568.8691850321. The cubic root of 31012304 is about 314.1796205456.

Adding to 31012304 its reverse (40321013), we get a palindrome (71333317).

The spelling of 31012304 in words is "thirty-one million, twelve thousand, three hundred four".