244200421 has 4 divisors (see below), whose sum is σ = 245839500. Its totient is φ = 242561344.

The previous prime is 244200419. The next prime is 244200443. The reversal of 244200421 is 124002442.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124002442 = 2 ⋅62001221.

It can be written as a sum of positive squares in 2 ways, for example, as 159744321 + 84456100 = 12639^2 + 9190^2 .

It is a cyclic number.

It is not a de Polignac number, because 244200421 - 2¹ = 244200419 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 (244200491) 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, 819316 + ... + 819613.

It is an arithmetic number, because the mean of its divisors is an integer number (61459875).

Almost surely, 2^244200421 is an apocalyptic number.

It is an amenable number.

244200421 is a deficient number, since it is larger than the sum of its proper divisors (1639079).

244200421 is a wasteful number, since it uses less digits than its factorization.

244200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639078.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 244200421 is about 15626.9133548503. The cubic root of 244200421 is about 625.0510217547.

Adding to 244200421 its reverse (124002442), we get a palindrome (368202863).

The spelling of 244200421 in words is "two hundred forty-four million, two hundred thousand, four hundred twenty-one".