187222061 has 4 divisors (see below), whose sum is σ = 201623772. Its totient is φ = 172820352.

The previous prime is 187222039. The next prime is 187222069. The reversal of 187222061 is 160222781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54834025 + 132388036 = 7405^2 + 11506^2 .

It is a cyclic number.

It is not a de Polignac number, because 187222061 - 2¹⁴ = 187205677 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 (187222069) 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, 7200836 + ... + 7200861.

It is an arithmetic number, because the mean of its divisors is an integer number (50405943).

Almost surely, 2^187222061 is an apocalyptic number.

It is an amenable number.

187222061 is a deficient number, since it is larger than the sum of its proper divisors (14401711).

187222061 is a wasteful number, since it uses less digits than its factorization.

187222061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14401710.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 187222061 is about 13682.9112764791. The cubic root of 187222061 is about 572.0741718820.

The spelling of 187222061 in words is "one hundred eighty-seven million, two hundred twenty-two thousand, sixty-one".