91196220 has 48 divisors (see below), whose sum is σ = 259545888. Its totient is φ = 23919360.

The previous prime is 91196201. The next prime is 91196239. The reversal of 91196220 is 2269119.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91196201) and next prime (91196239).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8799 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (5407206).

Almost surely, 2^91196220 is an apocalyptic number.

It is an amenable number.

91196220 is an abundant number, since it is smaller than the sum of its proper divisors (168349668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91196220 is a wasteful number, since it uses less digits than its factorization.

91196220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24990 (or 24988 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 91196220 is about 9549.6711985283. The cubic root of 91196220 is about 450.1172040391.

The spelling of 91196220 in words is "ninety-one million, one hundred ninety-six thousand, two hundred twenty".