216899053 has 4 divisors (see below), whose sum is σ = 247884640. Its totient is φ = 185913468.

The previous prime is 216899051. The next prime is 216899063. The reversal of 216899053 is 350998612.

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.

It is a cyclic number.

It is not a de Polignac number, because 216899053 - 2¹ = 216899051 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 (216899051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15492783 + ... + 15492796.

It is an arithmetic number, because the mean of its divisors is an integer number (61971160).

Almost surely, 2^216899053 is an apocalyptic number.

It is an amenable number.

216899053 is a deficient number, since it is larger than the sum of its proper divisors (30985587).

216899053 is an equidigital number, since it uses as much as digits as its factorization.

216899053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30985586.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 216899053 is about 14727.4930996419. The cubic root of 216899053 is about 600.8313041718.

The spelling of 216899053 in words is "two hundred sixteen million, eight hundred ninety-nine thousand, fifty-three".