91256201 has 8 divisors (see below), whose sum is σ = 94314024. Its totient is φ = 88238080.

The previous prime is 91256197. The next prime is 91256213. The reversal of 91256201 is 10265219.

It can be written as a sum of positive squares in 4 ways, for example, as 15217801 + 76038400 = 3901^2 + 8720^2 .

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 91256201 - 2² = 91256197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91256251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5216 + ... + 14481.

It is an arithmetic number, because the mean of its divisors is an integer number (11789253).

Almost surely, 2^91256201 is an apocalyptic number.

It is an amenable number.

91256201 is a deficient number, since it is larger than the sum of its proper divisors (3057823).

91256201 is a wasteful number, since it uses less digits than its factorization.

91256201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19851.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 91256201 is about 9552.8111569318. The cubic root of 91256201 is about 450.2158651571.

The spelling of 91256201 in words is "ninety-one million, two hundred fifty-six thousand, two hundred one".