187222 has 16 divisors (see below), whose sum is σ = 329472. Its totient is φ = 78120.

The previous prime is 187219. The next prime is 187223. The reversal of 187222 is 222781.

It is a junction number, because it is equal to n+sod(n) for n = 187193 and 187202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447 + ... + 757.

It is an arithmetic number, because the mean of its divisors is an integer number (20592).

2¹⁸⁷²²² is an apocalyptic number.

187222 is a deficient number, since it is larger than the sum of its proper divisors (142250).

187222 is a wasteful number, since it uses less digits than its factorization.

187222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its digits is 448, while the sum is 22.

The square root of 187222 is about 432.6915760678. The cubic root of 187222 is about 57.2074109752.

It can be divided in two parts, 187 and 222, that multiplied together give a palindrome (41514).

The spelling of 187222 in words is "one hundred eighty-seven thousand, two hundred twenty-two".