213189998 has 32 divisors (see below), whose sum is σ = 373690368. Its totient is φ = 89330400.

The previous prime is 213189997. The next prime is 213190027. The reversal of 213189998 is 899981312.

It is a happy number.

213189998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213189997) 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, 162461 + ... + 163767.

It is an arithmetic number, because the mean of its divisors is an integer number (11677824).

Almost surely, 2^213189998 is an apocalyptic number.

213189998 is a deficient number, since it is larger than the sum of its proper divisors (160500370).

213189998 is a wasteful number, since it uses less digits than its factorization.

213189998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its digits is 279936, while the sum is 50.

The square root of 213189998 is about 14601.0272926257. The cubic root of 213189998 is about 597.3867812999.

It can be divided in two parts, 2131 and 89998, that added together give a palindrome (92129).

The spelling of 213189998 in words is "two hundred thirteen million, one hundred eighty-nine thousand, nine hundred ninety-eight".