195005251 has 24 divisors (see below), whose sum is σ = 237006000. Its totient is φ = 159776064.

The previous prime is 195005243. The next prime is 195005267. The reversal of 195005251 is 152500591.

It is not a de Polignac number, because 195005251 - 2³ = 195005243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195005231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154260 + ... + 155518.

It is an arithmetic number, because the mean of its divisors is an integer number (9875250).

Almost surely, 2^195005251 is an apocalyptic number.

195005251 is a deficient number, since it is larger than the sum of its proper divisors (42000749).

195005251 is a wasteful number, since it uses less digits than its factorization.

195005251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 195005251 is about 13964.4280584634. The cubic root of 195005251 is about 579.8942048415.

The spelling of 195005251 in words is "one hundred ninety-five million, five thousand, two hundred fifty-one".