31189253 has 2 divisors, whose sum is σ = 31189254. Its totient is φ = 31189252.

The previous prime is 31189217. The next prime is 31189259. The reversal of 31189253 is 35298113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29789764 + 1399489 = 5458^2 + 1183^2 .

It is an emirp because it is prime and its reverse (35298113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31189253 - 2⁶ = 31189189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31189259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15594626 + 15594627.

It is an arithmetic number, because the mean of its divisors is an integer number (15594627).

Almost surely, 2^31189253 is an apocalyptic number.

It is an amenable number.

31189253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31189253 is an equidigital number, since it uses as much as digits as its factorization.

31189253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 31189253 is about 5584.7339238320. The cubic root of 31189253 is about 314.7760329516.

The spelling of 31189253 in words is "thirty-one million, one hundred eighty-nine thousand, two hundred fifty-three".