215426189 has 8 divisors (see below), whose sum is σ = 235174368. Its totient is φ = 195705360.

The previous prime is 215426171. The next prime is 215426201. The reversal of 215426189 is 981624512.

215426189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215426189 - 2¹² = 215422093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215426129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11879 + ... + 23915.

It is an arithmetic number, because the mean of its divisors is an integer number (29396796).

Almost surely, 2^215426189 is an apocalyptic number.

It is an amenable number.

215426189 is a deficient number, since it is larger than the sum of its proper divisors (19748179).

215426189 is a wasteful number, since it uses less digits than its factorization.

215426189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13675.

The product of its digits is 34560, while the sum is 38.

The square root of 215426189 is about 14677.4040279608. The cubic root of 215426189 is about 599.4682223453.

The spelling of 215426189 in words is "two hundred fifteen million, four hundred twenty-six thousand, one hundred eighty-nine".