1344402221 has 2 divisors, whose sum is σ = 1344402222. Its totient is φ = 1344402220.

The previous prime is 1344402217. The next prime is 1344402229. The reversal of 1344402221 is 1222044431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 830246596 + 514155625 = 28814^2 + 22675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344402221 - 2² = 1344402217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344402229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672201110 + 672201111.

It is an arithmetic number, because the mean of its divisors is an integer number (672201111).

Almost surely, 2^1344402221 is an apocalyptic number.

It is an amenable number.

1344402221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344402221 is an equidigital number, since it uses as much as digits as its factorization.

1344402221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1344402221 is about 36666.0908879035. The cubic root of 1344402221 is about 1103.6797485841.

Adding to 1344402221 its reverse (1222044431), we get a palindrome (2566446652).

The spelling of 1344402221 in words is "one billion, three hundred forty-four million, four hundred two thousand, two hundred twenty-one".