195740551 has 4 divisors (see below), whose sum is σ = 196274272. Its totient is φ = 195206832.

The previous prime is 195740549. The next prime is 195740561. The reversal of 195740551 is 155047591.

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 195740551 - 2¹ = 195740549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195740551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195740561) 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, 266310 + ... + 267043.

It is an arithmetic number, because the mean of its divisors is an integer number (49068568).

Almost surely, 2^195740551 is an apocalyptic number.

195740551 is a deficient number, since it is larger than the sum of its proper divisors (533721).

195740551 is an equidigital number, since it uses as much as digits as its factorization.

195740551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533720.

The product of its (nonzero) digits is 31500, while the sum is 37.

The square root of 195740551 is about 13990.7308958467. The cubic root of 195740551 is about 580.6221534372.

The spelling of 195740551 in words is "one hundred ninety-five million, seven hundred forty thousand, five hundred fifty-one".