90216563 has 4 divisors (see below), whose sum is σ = 90472488. Its totient is φ = 89960640.

The previous prime is 90216551. The next prime is 90216583. The reversal of 90216563 is 36561209.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90216563 - 2¹² = 90212467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90216583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127433 + ... + 128138.

It is an arithmetic number, because the mean of its divisors is an integer number (22618122).

Almost surely, 2^90216563 is an apocalyptic number.

90216563 is a deficient number, since it is larger than the sum of its proper divisors (255925).

90216563 is a wasteful number, since it uses less digits than its factorization.

90216563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255924.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 90216563 is about 9498.2399948622. The cubic root of 90216563 is about 448.4996335691.

The spelling of 90216563 in words is "ninety million, two hundred sixteen thousand, five hundred sixty-three".