31244072 has 16 divisors (see below), whose sum is σ = 58662240. Its totient is φ = 15600816.

The previous prime is 31243967. The next prime is 31244077. The reversal of 31244072 is 27044213.

It is a super-3 number, since 3×31244072³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31244077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4853 + ... + 9275.

It is an arithmetic number, because the mean of its divisors is an integer number (3666390).

Almost surely, 2^31244072 is an apocalyptic number.

It is an amenable number.

31244072 is a deficient number, since it is larger than the sum of its proper divisors (27418168).

31244072 is a wasteful number, since it uses less digits than its factorization.

31244072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 31244072 is about 5589.6397021633. The cubic root of 31244072 is about 314.9603443822.

Adding to 31244072 its reverse (27044213), we get a palindrome (58288285).

The spelling of 31244072 in words is "thirty-one million, two hundred forty-four thousand, seventy-two".