252543221197 has 2 divisors, whose sum is σ = 252543221198. Its totient is φ = 252543221196.

The previous prime is 252543221159. The next prime is 252543221237. The reversal of 252543221197 is 791122345252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231417761481 + 21125459716 = 481059^2 + 145346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252543221197 is a prime.

It is a super-2 number, since 2×252543221197² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252543225197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126271610598 + 126271610599.

It is an arithmetic number, because the mean of its divisors is an integer number (126271610599).

Almost surely, 2^252543221197 is an apocalyptic number.

It is an amenable number.

252543221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

252543221197 is an equidigital number, since it uses as much as digits as its factorization.

252543221197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The spelling of 252543221197 in words is "two hundred fifty-two billion, five hundred forty-three million, two hundred twenty-one thousand, one hundred ninety-seven".