90215385 has 16 divisors (see below), whose sum is σ = 155448384. Its totient is φ = 44413632.

The previous prime is 90215383. The next prime is 90215387. The reversal of 90215385 is 58351209.

It is an interprime number because it is at equal distance from previous prime (90215383) and next prime (90215387).

It is not a de Polignac number, because 90215385 - 2¹ = 90215383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90215383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231127 + ... + 231516.

It is an arithmetic number, because the mean of its divisors is an integer number (9715524).

Almost surely, 2^90215385 is an apocalyptic number.

It is an amenable number.

90215385 is a deficient number, since it is larger than the sum of its proper divisors (65232999).

90215385 is a wasteful number, since it uses less digits than its factorization.

90215385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462664.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 90215385 is about 9498.1779831713. The cubic root of 90215385 is about 448.4976814706.

The spelling of 90215385 in words is "ninety million, two hundred fifteen thousand, three hundred eighty-five".