31486253 has 2 divisors, whose sum is σ = 31486254. Its totient is φ = 31486252.

The previous prime is 31486229. The next prime is 31486267. The reversal of 31486253 is 35268413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16104169 + 15382084 = 4013^2 + 3922^2 .

It is an emirp because it is prime and its reverse (35268413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31486253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31486283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15743126 + 15743127.

It is an arithmetic number, because the mean of its divisors is an integer number (15743127).

Almost surely, 2^31486253 is an apocalyptic number.

It is an amenable number.

31486253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31486253 is an equidigital number, since it uses as much as digits as its factorization.

31486253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 31486253 is about 5611.2612664177. The cubic root of 31486253 is about 315.7720308723.

The spelling of 31486253 in words is "thirty-one million, four hundred eighty-six thousand, two hundred fifty-three".