90211011 has 16 divisors (see below), whose sum is σ = 133177728. Its totient is φ = 53856000.

The previous prime is 90211003. The next prime is 90211039. The reversal of 90211011 is 11011209.

It is not a de Polignac number, because 90211011 - 2³ = 90211003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90211091) 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, 18190 + ... + 22611.

It is an arithmetic number, because the mean of its divisors is an integer number (8323608).

Almost surely, 2^90211011 is an apocalyptic number.

90211011 is a deficient number, since it is larger than the sum of its proper divisors (42966717).

90211011 is a wasteful number, since it uses less digits than its factorization.

90211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40882.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 90211011 is about 9497.9477256932. The cubic root of 90211011 is about 448.4904330374.

The spelling of 90211011 in words is "ninety million, two hundred eleven thousand, eleven".