195651257 has 8 divisors (see below), whose sum is σ = 200407200. Its totient is φ = 190943424.

The previous prime is 195651193. The next prime is 195651259. The reversal of 195651257 is 752156591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195651257 - 2⁶ = 195651193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195651259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3728 + ... + 20129.

It is an arithmetic number, because the mean of its divisors is an integer number (25050900).

Almost surely, 2^195651257 is an apocalyptic number.

It is an amenable number.

195651257 is a deficient number, since it is larger than the sum of its proper divisors (4755943).

195651257 is a wasteful number, since it uses less digits than its factorization.

195651257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24055.

The product of its digits is 94500, while the sum is 41.

The square root of 195651257 is about 13987.5393475765. The cubic root of 195651257 is about 580.5338495402.

The spelling of 195651257 in words is "one hundred ninety-five million, six hundred fifty-one thousand, two hundred fifty-seven".