1322533721 has 2 divisors, whose sum is σ = 1322533722. Its totient is φ = 1322533720.

The previous prime is 1322533711. The next prime is 1322533759. The reversal of 1322533721 is 1273352231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993510400 + 329023321 = 31520^2 + 18139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1322533721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1322533711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661266860 + 661266861.

It is an arithmetic number, because the mean of its divisors is an integer number (661266861).

Almost surely, 2^1322533721 is an apocalyptic number.

It is an amenable number.

1322533721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322533721 is an equidigital number, since it uses as much as digits as its factorization.

1322533721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 29.

The square root of 1322533721 is about 36366.6567201331. The cubic root of 1322533721 is about 1097.6627290388.

Adding to 1322533721 its reverse (1273352231), we get a palindrome (2595885952).

The spelling of 1322533721 in words is "one billion, three hundred twenty-two million, five hundred thirty-three thousand, seven hundred twenty-one".