252197971 has 2 divisors, whose sum is σ = 252197972. Its totient is φ = 252197970.

The previous prime is 252197951. The next prime is 252197977. The reversal of 252197971 is 179791252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252197971 - 2⁹ = 252197459 is a prime.

It is not a weakly prime, because it can be changed into another prime (252197977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126098985 + 126098986.

It is an arithmetic number, because the mean of its divisors is an integer number (126098986).

Almost surely, 2^252197971 is an apocalyptic number.

252197971 is a deficient number, since it is larger than the sum of its proper divisors (1).

252197971 is an equidigital number, since it uses as much as digits as its factorization.

252197971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 252197971 is about 15880.7421426078. The cubic root of 252197971 is about 631.8013207070.

The spelling of 252197971 in words is "two hundred fifty-two million, one hundred ninety-seven thousand, nine hundred seventy-one".