90581155 has 16 divisors (see below), whose sum is σ = 126763200. Its totient is φ = 62111616.

The previous prime is 90581149. The next prime is 90581159. The reversal of 90581155 is 55118509.

It is not a de Polignac number, because 90581155 - 2³ = 90581147 is a prime.

It is a super-2 number, since 2×90581155² = 16409891282268050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90581155.

It is not an unprimeable number, because it can be changed into a prime (90581159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24694 + ... + 28123.

It is an arithmetic number, because the mean of its divisors is an integer number (7922700).

Almost surely, 2^90581155 is an apocalyptic number.

90581155 is a deficient number, since it is larger than the sum of its proper divisors (36182045).

90581155 is an equidigital number, since it uses as much as digits as its factorization.

90581155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52843 (or 52829 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 90581155 is about 9517.4132515090. The cubic root of 90581155 is about 449.1029950413.

The spelling of 90581155 in words is "ninety million, five hundred eighty-one thousand, one hundred fifty-five".