1331222653 has 2 divisors, whose sum is σ = 1331222654. Its totient is φ = 1331222652.

The previous prime is 1331222623. The next prime is 1331222663. The reversal of 1331222653 is 3562221331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751472569 + 579750084 = 27413^2 + 24078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331222653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331222623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665611326 + 665611327.

It is an arithmetic number, because the mean of its divisors is an integer number (665611327).

Almost surely, 2^1331222653 is an apocalyptic number.

It is an amenable number.

1331222653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331222653 is an equidigital number, since it uses as much as digits as its factorization.

1331222653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 1331222653 is about 36485.9240392785. The cubic root of 1331222653 is about 1100.0613334947.

Adding to 1331222653 its reverse (3562221331), we get a palindrome (4893443984).

The spelling of 1331222653 in words is "one billion, three hundred thirty-one million, two hundred twenty-two thousand, six hundred fifty-three".