2200421 has 4 divisors (see below), whose sum is σ = 2203500. Its totient is φ = 2197344.

The previous prime is 2200403. The next prime is 2200423. The reversal of 2200421 is 1240022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 923521 + 1276900 = 961^2 + 1130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2200421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200423) 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, 155 + ... + 2103.

It is an arithmetic number, because the mean of its divisors is an integer number (550875).

2^2200421 is an apocalyptic number.

It is an amenable number.

2200421 is a deficient number, since it is larger than the sum of its proper divisors (3079).

2200421 is a wasteful number, since it uses less digits than its factorization.

2200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2200421 is about 1483.3816097013. The cubic root of 2200421 is about 130.0674403530.

Adding to 2200421 its reverse (1240022), we get a palindrome (3440443).

The spelling of 2200421 in words is "two million, two hundred thousand, four hundred twenty-one".