31129253 has 2 divisors, whose sum is σ = 31129254. Its totient is φ = 31129252.

The previous prime is 31129243. The next prime is 31129283. The reversal of 31129253 is 35292113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24275329 + 6853924 = 4927^2 + 2618^2 .

It is an emirp because it is prime and its reverse (35292113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31129253 - 2⁴ = 31129237 is a prime.

It is a super-3 number, since 3×31129253³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31129213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15564626 + 15564627.

It is an arithmetic number, because the mean of its divisors is an integer number (15564627).

Almost surely, 2^31129253 is an apocalyptic number.

It is an amenable number.

31129253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31129253 is an equidigital number, since it uses as much as digits as its factorization.

31129253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 26.

The square root of 31129253 is about 5579.3595510596. The cubic root of 31129253 is about 314.5740543418.

The spelling of 31129253 in words is "thirty-one million, one hundred twenty-nine thousand, two hundred fifty-three".