91130211 has 16 divisors (see below), whose sum is σ = 135198720. Its totient is φ = 60667560.

The previous prime is 91130147. The next prime is 91130219. The reversal of 91130211 is 11203119.

It is not a de Polignac number, because 91130211 - 2⁶ = 91130147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91130219) 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, 21346 + ... + 25256.

It is an arithmetic number, because the mean of its divisors is an integer number (8449920).

Almost surely, 2^91130211 is an apocalyptic number.

91130211 is a deficient number, since it is larger than the sum of its proper divisors (44068509).

91130211 is a wasteful number, since it uses less digits than its factorization.

91130211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4783 (or 4777 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 91130211 is about 9546.2144853340. The cubic root of 91130211 is about 450.0085776143.

The spelling of 91130211 in words is "ninety-one million, one hundred thirty thousand, two hundred eleven".