187222016 has 48 divisors (see below), whose sum is σ = 378132300. Its totient is φ = 92667904.

The previous prime is 187221977. The next prime is 187222027. The reversal of 187222016 is 610222781.

It can be written as a sum of positive squares in 2 ways, for example, as 184960000 + 2262016 = 13600^2 + 1504^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 187222016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231020 + ... + 231828.

Almost surely, 2^187222016 is an apocalyptic number.

187222016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187222016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189066150).

187222016 is an abundant number, since it is smaller than the sum of its proper divisors (190910284).

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

187222016 is an equidigital number, since it uses as much as digits as its factorization.

187222016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 924 counting only the distinct ones).

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

The square root of 187222016 is about 13682.9096320921. The cubic root of 187222016 is about 572.0741260481.

Adding to 187222016 its reverse (610222781), we get a palindrome (797444797).

The spelling of 187222016 in words is "one hundred eighty-seven million, two hundred twenty-two thousand, sixteen".