90255209 has 16 divisors (see below), whose sum is σ = 100331520. Its totient is φ = 80505360.

The previous prime is 90255203. The next prime is 90255241.

90255209 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90255209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90255203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245744 + ... + 246110.

It is an arithmetic number, because the mean of its divisors is an integer number (6270720).

Almost surely, 2^90255209 is an apocalyptic number.

It is an amenable number.

90255209 is a deficient number, since it is larger than the sum of its proper divisors (10076311).

90255209 is a wasteful number, since it uses less digits than its factorization.

90255209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 90255209 is about 9500.2741539389. The cubic root of 90255209 is about 448.5636655751.

The spelling of 90255209 in words is "ninety million, two hundred fifty-five thousand, two hundred nine".