187342221 has 8 divisors (see below), whose sum is σ = 272497824. Its totient is φ = 113540720.

The previous prime is 187342217. The next prime is 187342231. The reversal of 187342221 is 122243781.

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 187342221 - 2² = 187342217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187342231) 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, 2838486 + ... + 2838551.

It is an arithmetic number, because the mean of its divisors is an integer number (34062228).

Almost surely, 2^187342221 is an apocalyptic number.

187342221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

187342221 is a deficient number, since it is larger than the sum of its proper divisors (85155603).

187342221 is a wasteful number, since it uses less digits than its factorization.

187342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677051.

The product of its digits is 5376, while the sum is 30.

The square root of 187342221 is about 13687.3014506147. The cubic root of 187342221 is about 572.1965323406.

The spelling of 187342221 in words is "one hundred eighty-seven million, three hundred forty-two thousand, two hundred twenty-one".