195252491 has 4 divisors (see below), whose sum is σ = 223145712. Its totient is φ = 167359272.

The previous prime is 195252481. The next prime is 195252509. The reversal of 195252491 is 194252591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 195252491 - 2¹⁸ = 194990347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195252481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13946600 + ... + 13946613.

It is an arithmetic number, because the mean of its divisors is an integer number (55786428).

Almost surely, 2^195252491 is an apocalyptic number.

195252491 is a deficient number, since it is larger than the sum of its proper divisors (27893221).

195252491 is an equidigital number, since it uses as much as digits as its factorization.

195252491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27893220.

The product of its digits is 32400, while the sum is 38.

The square root of 195252491 is about 13973.2777471859. The cubic root of 195252491 is about 580.1391768660.

The spelling of 195252491 in words is "one hundred ninety-five million, two hundred fifty-two thousand, four hundred ninety-one".