90218253 has 4 divisors (see below), whose sum is σ = 120291008. Its totient is φ = 60145500.

The previous prime is 90218231. The next prime is 90218273. The reversal of 90218253 is 35281209.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35281209 = 3 ⋅11760403.

It is not a de Polignac number, because 90218253 - 2⁵ = 90218221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90218253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90218273) 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 3 ways as a sum of consecutive naturals, for example, 15036373 + ... + 15036378.

It is an arithmetic number, because the mean of its divisors is an integer number (30072752).

Almost surely, 2^90218253 is an apocalyptic number.

It is an amenable number.

90218253 is a deficient number, since it is larger than the sum of its proper divisors (30072755).

90218253 is a wasteful number, since it uses less digits than its factorization.

90218253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30072754.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 90218253 is about 9498.3289582958. The cubic root of 90218253 is about 448.5024340883.

The spelling of 90218253 in words is "ninety million, two hundred eighteen thousand, two hundred fifty-three".