91455550 has 24 divisors (see below), whose sum is σ = 179062200. Its totient is φ = 34656480.

The previous prime is 91455523. The next prime is 91455557. The reversal of 91455550 is 5555419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91455557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47185 + ... + 49084.

It is an arithmetic number, because the mean of its divisors is an integer number (7460925).

Almost surely, 2^91455550 is an apocalyptic number.

91455550 is a deficient number, since it is larger than the sum of its proper divisors (87606650).

91455550 is a wasteful number, since it uses less digits than its factorization.

91455550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96300 (or 96295 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 91455550 is about 9563.2395138886. The cubic root of 91455550 is about 450.5434586348.

The spelling of 91455550 in words is "ninety-one million, four hundred fifty-five thousand, five hundred fifty".