90355551 has 16 divisors (see below), whose sum is σ = 141536640. Its totient is φ = 50548320.

The previous prime is 90355519. The next prime is 90355553. The reversal of 90355551 is 15555309.

It is not a de Polignac number, because 90355551 - 2⁵ = 90355519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90355553) 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, 104881 + ... + 105738.

It is an arithmetic number, because the mean of its divisors is an integer number (8846040).

Almost surely, 2^90355551 is an apocalyptic number.

90355551 is a deficient number, since it is larger than the sum of its proper divisors (51181089).

90355551 is a wasteful number, since it uses less digits than its factorization.

90355551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210646.

The product of its (nonzero) digits is 16875, while the sum is 33.

The square root of 90355551 is about 9505.5536924474. The cubic root of 90355551 is about 448.7298355063.

The spelling of 90355551 in words is "ninety million, three hundred fifty-five thousand, five hundred fifty-one".