90221315 has 16 divisors (see below), whose sum is σ = 112475136. Its totient is φ = 69400800.

The previous prime is 90221309. The next prime is 90221321. The reversal of 90221315 is 51312209.

It is an interprime number because it is at equal distance from previous prime (90221309) and next prime (90221321).

It is not a de Polignac number, because 90221315 - 2⁶ = 90221251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23480 + ... + 27050.

It is an arithmetic number, because the mean of its divisors is an integer number (7029696).

Almost surely, 2^90221315 is an apocalyptic number.

90221315 is a deficient number, since it is larger than the sum of its proper divisors (22253821).

90221315 is a wasteful number, since it uses less digits than its factorization.

90221315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 90221315 is about 9498.4901431754. The cubic root of 90221315 is about 448.5075080760.

The spelling of 90221315 in words is "ninety million, two hundred twenty-one thousand, three hundred fifteen".