195663451 has 4 divisors (see below), whose sum is σ = 196065712. Its totient is φ = 195261192.

The previous prime is 195663449. The next prime is 195663469. The reversal of 195663451 is 154366591.

It is a happy number.

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 195663451 - 2¹ = 195663449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195663431) 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, 200400 + ... + 201373.

It is an arithmetic number, because the mean of its divisors is an integer number (49016428).

Almost surely, 2^195663451 is an apocalyptic number.

195663451 is a deficient number, since it is larger than the sum of its proper divisors (402261).

195663451 is an equidigital number, since it uses as much as digits as its factorization.

195663451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402260.

The product of its digits is 97200, while the sum is 40.

The square root of 195663451 is about 13987.9752287456. The cubic root of 195663451 is about 580.5459099154.

The spelling of 195663451 in words is "one hundred ninety-five million, six hundred sixty-three thousand, four hundred fifty-one".