195220057 has 2 divisors, whose sum is σ = 195220058. Its totient is φ = 195220056.

The previous prime is 195220049. The next prime is 195220087. The reversal of 195220057 is 750022591.

195220057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193655056 + 1565001 = 13916^2 + 1251^2 .

It is a cyclic number.

It is not a de Polignac number, because 195220057 - 2³ = 195220049 is a prime.

It is a super-2 number, since 2×195220057² = 76221741310166498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195220007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97610028 + 97610029.

It is an arithmetic number, because the mean of its divisors is an integer number (97610029).

Almost surely, 2^195220057 is an apocalyptic number.

It is an amenable number.

195220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

195220057 is an equidigital number, since it uses as much as digits as its factorization.

195220057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 195220057 is about 13972.1171266204. The cubic root of 195220057 is about 580.1070521780.

The spelling of 195220057 in words is "one hundred ninety-five million, two hundred twenty thousand, fifty-seven".