2522181 has 4 divisors (see below), whose sum is σ = 3362912. Its totient is φ = 1681452.

The previous prime is 2522147. The next prime is 2522189. The reversal of 2522181 is 1812252.

It is a happy number.

2522181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 2522181 - 2⁷ = 2522053 is a prime.

It is a super-2 number, since 2×2522181² = 12722793993522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522189) 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 3 ways as a sum of consecutive naturals, for example, 420361 + ... + 420366.

It is an arithmetic number, because the mean of its divisors is an integer number (840728).

2^2522181 is an apocalyptic number.

It is an amenable number.

2522181 is a deficient number, since it is larger than the sum of its proper divisors (840731).

2522181 is an equidigital number, since it uses as much as digits as its factorization.

2522181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840730.

The product of its digits is 320, while the sum is 21.

The square root of 2522181 is about 1588.1375884979. The cubic root of 2522181 is about 136.1210895302.

The spelling of 2522181 in words is "two million, five hundred twenty-two thousand, one hundred eighty-one".