90857225 has 6 divisors (see below), whose sum is σ = 112662990. Its totient is φ = 72685760.

The previous prime is 90857219. The next prime is 90857269. The reversal of 90857225 is 52275809.

It can be written as a sum of positive squares in 3 ways, for example, as 23551609 + 67305616 = 4853^2 + 8204^2 .

It is not a de Polignac number, because 90857225 - 2⁶ = 90857161 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1817120 + ... + 1817169.

It is an arithmetic number, because the mean of its divisors is an integer number (18777165).

Almost surely, 2^90857225 is an apocalyptic number.

It is an amenable number.

90857225 is a deficient number, since it is larger than the sum of its proper divisors (21805765).

90857225 is a wasteful number, since it uses less digits than its factorization.

90857225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634299 (or 3634294 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 90857225 is about 9531.9056331879. The cubic root of 90857225 is about 449.5587856481.

The spelling of 90857225 in words is "ninety million, eight hundred fifty-seven thousand, two hundred twenty-five".