31204253 has 8 divisors (see below), whose sum is σ = 31626936. Its totient is φ = 30784000.

The previous prime is 31204237. The next prime is 31204267. The reversal of 31204253 is 35240213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10936249 + 20268004 = 3307^2 + 4502^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31204253 - 2⁴ = 31204237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31204273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52325 + ... + 52917.

It is an arithmetic number, because the mean of its divisors is an integer number (3953367).

Almost surely, 2^31204253 is an apocalyptic number.

It is an amenable number.

31204253 is a deficient number, since it is larger than the sum of its proper divisors (422683).

31204253 is a wasteful number, since it uses less digits than its factorization.

31204253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 31204253 is about 5586.0767091045. The cubic root of 31204253 is about 314.8264871231.

Adding to 31204253 its reverse (35240213), we get a palindrome (66444466).

The spelling of 31204253 in words is "thirty-one million, two hundred four thousand, two hundred fifty-three".