221661134 has 8 divisors (see below), whose sum is σ = 333756720. Its totient is φ = 110408896.

The previous prime is 221661133. The next prime is 221661137. The reversal of 221661134 is 431166122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221661133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210179 + ... + 211230.

It is an arithmetic number, because the mean of its divisors is an integer number (41719590).

Almost surely, 2^221661134 is an apocalyptic number.

221661134 is a deficient number, since it is larger than the sum of its proper divisors (112095586).

221661134 is a wasteful number, since it uses less digits than its factorization.

221661134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421674.

The product of its digits is 1728, while the sum is 26.

The square root of 221661134 is about 14888.2884845774. The cubic root of 221661134 is about 605.1966521436.

The spelling of 221661134 in words is "two hundred twenty-one million, six hundred sixty-one thousand, one hundred thirty-four".