244255421 has 2 divisors, whose sum is σ = 244255422. Its totient is φ = 244255420.

The previous prime is 244255411. The next prime is 244255433. The reversal of 244255421 is 124552442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207216025 + 37039396 = 14395^2 + 6086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244255421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244255411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122127710 + 122127711.

It is an arithmetic number, because the mean of its divisors is an integer number (122127711).

Almost surely, 2^244255421 is an apocalyptic number.

It is an amenable number.

244255421 is a deficient number, since it is larger than the sum of its proper divisors (1).

244255421 is an equidigital number, since it uses as much as digits as its factorization.

244255421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12800, while the sum is 29.

The square root of 244255421 is about 15628.6730402808. The cubic root of 244255421 is about 625.0979439037.

The spelling of 244255421 in words is "two hundred forty-four million, two hundred fifty-five thousand, four hundred twenty-one".