187872087222 has 24 divisors (see below), whose sum is σ = 407800371576. Its totient is φ = 62509539456.

The previous prime is 187872087173. The next prime is 187872087307. The reversal of 187872087222 is 222780278781.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9530683 + ... + 9550374.

It is an arithmetic number, because the mean of its divisors is an integer number (16991682149).

Almost surely, 2^187872087222 is an apocalyptic number.

187872087222 is an abundant number, since it is smaller than the sum of its proper divisors (219928284354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

187872087222 is a wasteful number, since it uses less digits than its factorization.

187872087222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19081612 (or 19081609 counting only the distinct ones).

The product of its (nonzero) digits is 2809856, while the sum is 54.

The spelling of 187872087222 in words is "one hundred eighty-seven billion, eight hundred seventy-two million, eighty-seven thousand, two hundred twenty-two".