2245181 has 4 divisors (see below), whose sum is σ = 2266272. Its totient is φ = 2224092.

The previous prime is 2245171. The next prime is 2245183. The reversal of 2245181 is 1815422.

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 2245181 - 2¹⁰ = 2244157 is a prime.

It is a super-2 number, since 2×2245181² = 10081675445522, which contains 22 as substring.

It is an Ulam 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 (2245183) 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, 10385 + ... + 10598.

It is an arithmetic number, because the mean of its divisors is an integer number (566568).

2^2245181 is an apocalyptic number.

It is an amenable number.

2245181 is a deficient number, since it is larger than the sum of its proper divisors (21091).

2245181 is a wasteful number, since it uses less digits than its factorization.

2245181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21090.

The product of its digits is 640, while the sum is 23.

The square root of 2245181 is about 1498.3928056421. The cubic root of 2245181 is about 130.9434520812.

The spelling of 2245181 in words is "two million, two hundred forty-five thousand, one hundred eighty-one".