221592149 has 8 divisors (see below), whose sum is σ = 227775648. Its totient is φ = 215418960.

The previous prime is 221592139. The next prime is 221592187. The reversal of 221592149 is 941295122.

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 221592149 - 2⁸ = 221591893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221592109) 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, 65354 + ... + 68660.

It is an arithmetic number, because the mean of its divisors is an integer number (28471956).

Almost surely, 2^221592149 is an apocalyptic number.

It is an amenable number.

221592149 is a deficient number, since it is larger than the sum of its proper divisors (6183499).

221592149 is a wasteful number, since it uses less digits than its factorization.

221592149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155.

The product of its digits is 12960, while the sum is 35.

The square root of 221592149 is about 14885.9715504229. The cubic root of 221592149 is about 605.1338628729.

The spelling of 221592149 in words is "two hundred twenty-one million, five hundred ninety-two thousand, one hundred forty-nine".