31233725 has 24 divisors (see below), whose sum is σ = 40726560. Its totient is φ = 23728320.

The previous prime is 31233721. The next prime is 31233731. The reversal of 31233725 is 52733213.

It is not a de Polignac number, because 31233725 - 2² = 31233721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31233694 and 31233703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48254 + ... + 48896.

It is an arithmetic number, because the mean of its divisors is an integer number (1696940).

Almost surely, 2^31233725 is an apocalyptic number.

It is an amenable number.

31233725 is a deficient number, since it is larger than the sum of its proper divisors (9492835).

31233725 is a wasteful number, since it uses less digits than its factorization.

31233725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 744 counting only the distinct ones).

The product of its digits is 3780, while the sum is 26.

The square root of 31233725 is about 5588.7140739172. The cubic root of 31233725 is about 314.9255724049.

Adding to 31233725 its reverse (52733213), we get a palindrome (83966938).

The spelling of 31233725 in words is "thirty-one million, two hundred thirty-three thousand, seven hundred twenty-five".