195210427 has 4 divisors (see below), whose sum is σ = 205484680. Its totient is φ = 184936176.

The previous prime is 195210403. The next prime is 195210461. The reversal of 195210427 is 724012591.

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 195210427 - 2¹⁵ = 195177659 is a prime.

It is a super-2 number, since 2×195210427² = 76214221619044658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195210227) 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, 5137098 + ... + 5137135.

It is an arithmetic number, because the mean of its divisors is an integer number (51371170).

Almost surely, 2^195210427 is an apocalyptic number.

195210427 is a deficient number, since it is larger than the sum of its proper divisors (10274253).

195210427 is a wasteful number, since it uses less digits than its factorization.

195210427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10274252.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 195210427 is about 13971.7725074523. The cubic root of 195210427 is about 580.0975133310.

The spelling of 195210427 in words is "one hundred ninety-five million, two hundred ten thousand, four hundred twenty-seven".