91544201 has 12 divisors (see below), whose sum is σ = 112755348. Its totient is φ = 73850112.

The previous prime is 91544183. The next prime is 91544221. The reversal of 91544201 is 10244519.

It can be written as a sum of positive squares in 2 ways, for example, as 45630025 + 45914176 = 6755^2 + 6776^2 .

It is not a de Polignac number, because 91544201 - 2⁶ = 91544137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91544221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54116 + ... + 55781.

It is an arithmetic number, because the mean of its divisors is an integer number (9396279).

Almost surely, 2^91544201 is an apocalyptic number.

It is an amenable number.

91544201 is a deficient number, since it is larger than the sum of its proper divisors (21211147).

91544201 is a wasteful number, since it uses less digits than its factorization.

91544201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109928 (or 109921 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 91544201 is about 9567.8733791789. The cubic root of 91544201 is about 450.6889873631.

The spelling of 91544201 in words is "ninety-one million, five hundred forty-four thousand, two hundred one".