722143361 has 2 divisors, whose sum is σ = 722143362. Its totient is φ = 722143360.

The previous prime is 722143349. The next prime is 722143379. The reversal of 722143361 is 163341227.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553143361 + 169000000 = 23519^2 + 13000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722143361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (722143061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361071680 + 361071681.

It is an arithmetic number, because the mean of its divisors is an integer number (361071681).

Almost surely, 2^722143361 is an apocalyptic number.

It is an amenable number.

722143361 is a deficient number, since it is larger than the sum of its proper divisors (1).

722143361 is an equidigital number, since it uses as much as digits as its factorization.

722143361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 722143361 is about 26872.7252246586. The cubic root of 722143361 is about 897.1694449239.

Adding to 722143361 its reverse (163341227), we get a palindrome (885484588).

The spelling of 722143361 in words is "seven hundred twenty-two million, one hundred forty-three thousand, three hundred sixty-one".