31252225 has 12 divisors (see below), whose sum is σ = 38930544. Its totient is φ = 24887120.

The previous prime is 31252223. The next prime is 31252229. The reversal of 31252225 is 52225213.

It is not a de Polignac number, because 31252225 - 2¹ = 31252223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31252196 and 31252205.

It is not an unprimeable number, because it can be changed into a prime (31252223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2922 + ... + 8428.

It is an arithmetic number, because the mean of its divisors is an integer number (3244212).

Almost surely, 2^31252225 is an apocalyptic number.

It is an amenable number.

31252225 is a deficient number, since it is larger than the sum of its proper divisors (7678319).

31252225 is a wasteful number, since it uses less digits than its factorization.

31252225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744 (or 5739 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 31252225 is about 5590.3689502572. The cubic root of 31252225 is about 314.9877378279.

Adding to 31252225 its reverse (52225213), we get a palindrome (83477438).

The spelling of 31252225 in words is "thirty-one million, two hundred fifty-two thousand, two hundred twenty-five".