244211421 has 4 divisors (see below), whose sum is σ = 325615232. Its totient is φ = 162807612.

The previous prime is 244211417. The next prime is 244211437. The reversal of 244211421 is 124112442.

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 244211421 - 2² = 244211417 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 (244211321) 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, 40701901 + ... + 40701906.

It is an arithmetic number, because the mean of its divisors is an integer number (81403808).

Almost surely, 2^244211421 is an apocalyptic number.

It is an amenable number.

244211421 is a deficient number, since it is larger than the sum of its proper divisors (81403811).

244211421 is an equidigital number, since it uses as much as digits as its factorization.

244211421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81403810.

The product of its digits is 512, while the sum is 21.

The square root of 244211421 is about 15627.2653077882. The cubic root of 244211421 is about 625.0604067481.

Adding to 244211421 its reverse (124112442), we get a palindrome (368323863).

The spelling of 244211421 in words is "two hundred forty-four million, two hundred eleven thousand, four hundred twenty-one".