195192251 has 4 divisors (see below), whose sum is σ = 195220272. Its totient is φ = 195164232.

The previous prime is 195192247. The next prime is 195192299. The reversal of 195192251 is 152291591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 195192251 - 2² = 195192247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195192241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5441 + ... + 20493.

It is an arithmetic number, because the mean of its divisors is an integer number (48805068).

Almost surely, 2^195192251 is an apocalyptic number.

195192251 is a deficient number, since it is larger than the sum of its proper divisors (28021).

195192251 is a wasteful number, since it uses less digits than its factorization.

195192251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28020.

The product of its digits is 8100, while the sum is 35.

The square root of 195192251 is about 13971.1220379753. The cubic root of 195192251 is about 580.0795085215.

The spelling of 195192251 in words is "one hundred ninety-five million, one hundred ninety-two thousand, two hundred fifty-one".