31555253 has 2 divisors, whose sum is σ = 31555254. Its totient is φ = 31555252.

The previous prime is 31555243. The next prime is 31555259. The reversal of 31555253 is 35255513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30393169 + 1162084 = 5513^2 + 1078^2 .

It is an emirp because it is prime and its reverse (35255513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31555253 - 2¹⁸ = 31293109 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31555259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15777626 + 15777627.

It is an arithmetic number, because the mean of its divisors is an integer number (15777627).

Almost surely, 2^31555253 is an apocalyptic number.

It is an amenable number.

31555253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31555253 is an equidigital number, since it uses as much as digits as its factorization.

31555253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 29.

The square root of 31555253 is about 5617.4062519992. The cubic root of 31555253 is about 316.0025269520.

The spelling of 31555253 in words is "thirty-one million, five hundred fifty-five thousand, two hundred fifty-three".