221153898 has 32 divisors (see below), whose sum is σ = 506169216. Its totient is φ = 63102528.

The previous prime is 221153893. The next prime is 221153909. The reversal of 221153898 is 898351122.

221153898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221153893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32740 + ... + 38912.

It is an arithmetic number, because the mean of its divisors is an integer number (15817788).

Almost surely, 2^221153898 is an apocalyptic number.

221153898 is an abundant number, since it is smaller than the sum of its proper divisors (285015318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221153898 is a wasteful number, since it uses less digits than its factorization.

221153898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038.

The product of its digits is 34560, while the sum is 39.

The square root of 221153898 is about 14871.2439963844. The cubic root of 221153898 is about 604.7346677053.

The spelling of 221153898 in words is "two hundred twenty-one million, one hundred fifty-three thousand, eight hundred ninety-eight".