256100522197 has 8 divisors (see below), whose sum is σ = 276259473560. Its totient is φ = 236007129600.

The previous prime is 256100522179. The next prime is 256100522213. The reversal of 256100522197 is 791225001652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 99885074116 + 156215448081 = 316046^2 + 395241^2 .

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 256100522197 - 2¹¹ = 256100520149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256100522137) 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, 16381572 + ... + 16397197.

It is an arithmetic number, because the mean of its divisors is an integer number (34532434195).

Almost surely, 2^256100522197 is an apocalyptic number.

It is an amenable number.

256100522197 is a deficient number, since it is larger than the sum of its proper divisors (20158951363).

256100522197 is a wasteful number, since it uses less digits than its factorization.

256100522197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32779383.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 256100522197 in words is "two hundred fifty-six billion, one hundred million, five hundred twenty-two thousand, one hundred ninety-seven".