32391251 has 2 divisors, whose sum is σ = 32391252. Its totient is φ = 32391250.

The previous prime is 32391211. The next prime is 32391253. The reversal of 32391251 is 15219323.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 32391251 - 2¹⁰ = 32390227 is a prime.

It is a Sophie Germain prime.

Together with 32391253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32391251.

It is not a weakly prime, because it can be changed into another prime (32391253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16195625 + 16195626.

It is an arithmetic number, because the mean of its divisors is an integer number (16195626).

Almost surely, 2^32391251 is an apocalyptic number.

32391251 is a deficient number, since it is larger than the sum of its proper divisors (1).

32391251 is an equidigital number, since it uses as much as digits as its factorization.

32391251 is an evil number, because the sum of its binary digits is even.

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

The square root of 32391251 is about 5691.3312151025. The cubic root of 32391251 is about 318.7688731104.

The spelling of 32391251 in words is "thirty-two million, three hundred ninety-one thousand, two hundred fifty-one".