165622 has 4 divisors (see below), whose sum is σ = 248436. Its totient is φ = 82810.

The previous prime is 165617. The next prime is 165653. The reversal of 165622 is 226561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226561 = 71 ⋅3191.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 165593 and 165602.

It is a congruent number.

It is an unprimeable number.

165622 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41404 + ... + 41407.

It is an arithmetic number, because the mean of its divisors is an integer number (62109).

2¹⁶⁵⁶²² is an apocalyptic number.

165622 is a deficient number, since it is larger than the sum of its proper divisors (82814).

165622 is an equidigital number, since it uses as much as digits as its factorization.

165622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82813.

The product of its digits is 720, while the sum is 22.

The square root of 165622 is about 406.9668291151. The cubic root of 165622 is about 54.9168992980.

Subtracting from 165622 its sum of digits (22), we obtain a triangular number (165600 = T₅₇₅).

It can be divided in two parts, 16562 and 2, that multiplied together give a square (33124 = 182²).

The spelling of 165622 in words is "one hundred sixty-five thousand, six hundred twenty-two".