91441855 has 16 divisors (see below), whose sum is σ = 111369024. Its totient is φ = 72069120.

The previous prime is 91441853. The next prime is 91441873. The reversal of 91441855 is 55814419.

It is not a de Polignac number, because 91441855 - 2¹ = 91441853 is a prime.

It is a super-2 number, since 2×91441855² = 16723225691682050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91441853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142335 + ... + 142975.

It is an arithmetic number, because the mean of its divisors is an integer number (6960564).

Almost surely, 2^91441855 is an apocalyptic number.

91441855 is a deficient number, since it is larger than the sum of its proper divisors (19927169).

91441855 is a wasteful number, since it uses less digits than its factorization.

91441855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026.

The product of its digits is 28800, while the sum is 37.

The square root of 91441855 is about 9562.5234640235. The cubic root of 91441855 is about 450.5209686541.

The spelling of 91441855 in words is "ninety-one million, four hundred forty-one thousand, eight hundred fifty-five".