31244425 has 12 divisors (see below), whose sum is σ = 39568896. Its totient is φ = 24462800.

The previous prime is 31244399. The next prime is 31244431. The reversal of 31244425 is 52444213.

It is a happy number.

It is not a de Polignac number, because 31244425 - 2¹¹ = 31242377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31244425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12121 + ... + 14470.

It is an arithmetic number, because the mean of its divisors is an integer number (3297408).

Almost surely, 2^31244425 is an apocalyptic number.

It is an amenable number.

31244425 is a deficient number, since it is larger than the sum of its proper divisors (8324471).

31244425 is a wasteful number, since it uses less digits than its factorization.

31244425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26648 (or 26643 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 31244425 is about 5589.6712783490. The cubic root of 31244425 is about 314.9615305335.

Adding to 31244425 its reverse (52444213), we get a palindrome (83688638).

The spelling of 31244425 in words is "thirty-one million, two hundred forty-four thousand, four hundred twenty-five".