622181 has 4 divisors (see below), whose sum is σ = 711072. Its totient is φ = 533292.

The previous prime is 622177. The next prime is 622187. The reversal of 622181 is 181226.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 622181 - 2² = 622177 is a prime.

It is a super-2 number, since 2×622181² = 774218393522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622187) 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, 44435 + ... + 44448.

It is an arithmetic number, because the mean of its divisors is an integer number (177768).

2⁶²²¹⁸¹ is an apocalyptic number.

It is an amenable number.

622181 is a deficient number, since it is larger than the sum of its proper divisors (88891).

622181 is an equidigital number, since it uses as much as digits as its factorization.

622181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88890.

The product of its digits is 192, while the sum is 20.

The square root of 622181 is about 788.7845079615. The cubic root of 622181 is about 85.3700589938.

The spelling of 622181 in words is "six hundred twenty-two thousand, one hundred eighty-one".