31012253 has 4 divisors (see below), whose sum is σ = 31850460. Its totient is φ = 30174048.

The previous prime is 31012243. The next prime is 31012273. The reversal of 31012253 is 35221013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12020089 + 18992164 = 3467^2 + 4358^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012253 - 2¹⁰ = 31011229 is a prime.

It is a super-2 number, since 2×31012253² = 1923519672272018, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012213) 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, 419048 + ... + 419121.

It is an arithmetic number, because the mean of its divisors is an integer number (7962615).

Almost surely, 2^31012253 is an apocalyptic number.

It is an amenable number.

31012253 is a deficient number, since it is larger than the sum of its proper divisors (838207).

31012253 is an equidigital number, since it uses as much as digits as its factorization.

31012253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838206.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31012253 is about 5568.8646060036. The cubic root of 31012253 is about 314.1794483218.

Adding to 31012253 its reverse (35221013), we get a palindrome (66233266).

The spelling of 31012253 in words is "thirty-one million, twelve thousand, two hundred fifty-three".