31725263 has 2 divisors, whose sum is σ = 31725264. Its totient is φ = 31725262.

The previous prime is 31725241. The next prime is 31725277. The reversal of 31725263 is 36252713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31725263 - 2²² = 27530959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31755263) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15862631 + 15862632.

It is an arithmetic number, because the mean of its divisors is an integer number (15862632).

Almost surely, 2^31725263 is an apocalyptic number.

31725263 is a deficient number, since it is larger than the sum of its proper divisors (1).

31725263 is an equidigital number, since it uses as much as digits as its factorization.

31725263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 31725263 is about 5632.5183532768. The cubic root of 31725263 is about 316.5690189536.

Adding to 31725263 its reverse (36252713), we get a palindrome (67977976).

The spelling of 31725263 in words is "thirty-one million, seven hundred twenty-five thousand, two hundred sixty-three".