195266257 has 8 divisors (see below), whose sum is σ = 199172520. Its totient is φ = 191368320.

The previous prime is 195266177. The next prime is 195266261. The reversal of 195266257 is 752662591.

195266257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 105698961 + 89567296 = 10281^2 + 9464^2 .

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 195266257 - 2⁷ = 195266129 is a prime.

It is a super-2 number, since 2×195266257² = 76257822245580098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195266557) 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, 68619 + ... + 71407.

It is an arithmetic number, because the mean of its divisors is an integer number (24896565).

Almost surely, 2^195266257 is an apocalyptic number.

It is an amenable number.

195266257 is a deficient number, since it is larger than the sum of its proper divisors (3906263).

195266257 is a wasteful number, since it uses less digits than its factorization.

195266257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163.

The product of its digits is 226800, while the sum is 43.

The square root of 195266257 is about 13973.7703215703. The cubic root of 195266257 is about 580.1528105089.

The spelling of 195266257 in words is "one hundred ninety-five million, two hundred sixty-six thousand, two hundred fifty-seven".