1244153213 has 2 divisors, whose sum is σ = 1244153214. Its totient is φ = 1244153212.

The previous prime is 1244153203. The next prime is 1244153219. The reversal of 1244153213 is 3123514421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1046975449 + 197177764 = 32357^2 + 14042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244153213 - 2²⁰ = 1243104637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244153219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622076606 + 622076607.

It is an arithmetic number, because the mean of its divisors is an integer number (622076607).

Almost surely, 2^1244153213 is an apocalyptic number.

It is an amenable number.

1244153213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244153213 is an equidigital number, since it uses as much as digits as its factorization.

1244153213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 1244153213 is about 35272.5560882678. The cubic root of 1244153213 is about 1075.5351834542.

Adding to 1244153213 its reverse (3123514421), we get a palindrome (4367667634).

The spelling of 1244153213 in words is "one billion, two hundred forty-four million, one hundred fifty-three thousand, two hundred thirteen".