252111397 has 2 divisors, whose sum is σ = 252111398. Its totient is φ = 252111396.

The previous prime is 252111331. The next prime is 252111401. The reversal of 252111397 is 793111252.

252111397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145588356 + 106523041 = 12066^2 + 10321^2 .

It is a cyclic number.

It is not a de Polignac number, because 252111397 - 2⁷ = 252111269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252111697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126055698 + 126055699.

It is an arithmetic number, because the mean of its divisors is an integer number (126055699).

Almost surely, 2^252111397 is an apocalyptic number.

It is an amenable number.

252111397 is a deficient number, since it is larger than the sum of its proper divisors (1).

252111397 is an equidigital number, since it uses as much as digits as its factorization.

252111397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 31.

The square root of 252111397 is about 15878.0161544193. The cubic root of 252111397 is about 631.7290179477.

The spelling of 252111397 in words is "two hundred fifty-two million, one hundred eleven thousand, three hundred ninety-seven".