90271215 has 24 divisors (see below), whose sum is σ = 158361840. Its totient is φ = 47562624.

The previous prime is 90271211. The next prime is 90271271. The reversal of 90271215 is 51217209.

It is not a de Polignac number, because 90271215 - 2² = 90271211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90271211) 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 23 ways as a sum of consecutive naturals, for example, 8350 + ... + 15819.

It is an arithmetic number, because the mean of its divisors is an integer number (6598410).

Almost surely, 2^90271215 is an apocalyptic number.

90271215 is a deficient number, since it is larger than the sum of its proper divisors (68090625).

90271215 is a wasteful number, since it uses less digits than its factorization.

90271215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24263 (or 24260 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 90271215 is about 9501.1165133367. The cubic root of 90271215 is about 448.5901803352.

The spelling of 90271215 in words is "ninety million, two hundred seventy-one thousand, two hundred fifteen".