187052221 has 8 divisors (see below), whose sum is σ = 188596224. Its totient is φ = 185514480.

The previous prime is 187052219. The next prime is 187052227. The reversal of 187052221 is 122250781.

187052221 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 not a de Polignac number, because 187052221 - 2¹ = 187052219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 187052221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187052227) 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, 71875 + ... + 74431.

It is an arithmetic number, because the mean of its divisors is an integer number (23574528).

Almost surely, 2^187052221 is an apocalyptic number.

It is an amenable number.

187052221 is a deficient number, since it is larger than the sum of its proper divisors (1544003).

187052221 is a wasteful number, since it uses less digits than its factorization.

187052221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 187052221 is about 13676.7035867566. The cubic root of 187052221 is about 571.9011323163.

The spelling of 187052221 in words is "one hundred eighty-seven million, fifty-two thousand, two hundred twenty-one".