195133257 has 24 divisors (see below), whose sum is σ = 318090240. Its totient is φ = 114182880.

The previous prime is 195133247. The next prime is 195133261. The reversal of 195133257 is 752331591.

It is not a de Polignac number, because 195133257 - 2⁷ = 195133129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195133207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31113 + ... + 36854.

It is an arithmetic number, because the mean of its divisors is an integer number (13253760).

Almost surely, 2^195133257 is an apocalyptic number.

It is an amenable number.

195133257 is a deficient number, since it is larger than the sum of its proper divisors (122956983).

195133257 is a wasteful number, since it uses less digits than its factorization.

195133257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68013 (or 68010 counting only the distinct ones).

The product of its digits is 28350, while the sum is 36.

The square root of 195133257 is about 13969.0105948847. The cubic root of 195133257 is about 580.0210624535.

The spelling of 195133257 in words is "one hundred ninety-five million, one hundred thirty-three thousand, two hundred fifty-seven".