91083551 has 16 divisors (see below), whose sum is σ = 100548000. Its totient is φ = 81994368.

The previous prime is 91083539. The next prime is 91083563. The reversal of 91083551 is 15538019.

It is an interprime number because it is at equal distance from previous prime (91083539) and next prime (91083563).

It is a cyclic number.

It is not a de Polignac number, because 91083551 - 2¹⁰ = 91082527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91083571) 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, 113885 + ... + 114681.

It is an arithmetic number, because the mean of its divisors is an integer number (6284250).

Almost surely, 2^91083551 is an apocalyptic number.

91083551 is a deficient number, since it is larger than the sum of its proper divisors (9464449).

91083551 is a wasteful number, since it uses less digits than its factorization.

91083551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 91083551 is about 9543.7702717532. The cubic root of 91083551 is about 449.9317608460.

The spelling of 91083551 in words is "ninety-one million, eighty-three thousand, five hundred fifty-one".