195012157 has 2 divisors, whose sum is σ = 195012158. Its totient is φ = 195012156.

The previous prime is 195012149. The next prime is 195012161. The reversal of 195012157 is 751210591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138627076 + 56385081 = 11774^2 + 7509^2 .

It is a cyclic number.

It is not a de Polignac number, because 195012157 - 2³ = 195012149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195012137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97506078 + 97506079.

It is an arithmetic number, because the mean of its divisors is an integer number (97506079).

Almost surely, 2^195012157 is an apocalyptic number.

It is an amenable number.

195012157 is a deficient number, since it is larger than the sum of its proper divisors (1).

195012157 is an equidigital number, since it uses as much as digits as its factorization.

195012157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 195012157 is about 13964.6753274109. The cubic root of 195012157 is about 579.9010503018.

The spelling of 195012157 in words is "one hundred ninety-five million, twelve thousand, one hundred fifty-seven".