90215543 has 12 divisors (see below), whose sum is σ = 100851240. Its totient is φ = 80617680.

The previous prime is 90215507. The next prime is 90215557. The reversal of 90215543 is 34551209.

It is not a de Polignac number, because 90215543 - 2⁶ = 90215479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90212543) 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 11 ways as a sum of consecutive naturals, for example, 821 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (8404270).

Almost surely, 2^90215543 is an apocalyptic number.

90215543 is a deficient number, since it is larger than the sum of its proper divisors (10635697).

90215543 is a wasteful number, since it uses less digits than its factorization.

90215543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12718 (or 12707 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 90215543 is about 9498.1863005523. The cubic root of 90215543 is about 448.4979432980.

The spelling of 90215543 in words is "ninety million, two hundred fifteen thousand, five hundred forty-three".