722311081 has 2 divisors, whose sum is σ = 722311082. Its totient is φ = 722311080.

The previous prime is 722311043. The next prime is 722311111. The reversal of 722311081 is 180113227.

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., 472671081 + 249640000 = 21741^2 + 15800^2 .

It is a cyclic number.

It is not a de Polignac number, because 722311081 - 2¹¹ = 722309033 is a prime.

It is a super-3 number, since 3×722311081³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (722311781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361155540 + 361155541.

It is an arithmetic number, because the mean of its divisors is an integer number (361155541).

Almost surely, 2^722311081 is an apocalyptic number.

It is an amenable number.

722311081 is a deficient number, since it is larger than the sum of its proper divisors (1).

722311081 is an equidigital number, since it uses as much as digits as its factorization.

722311081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 722311081 is about 26875.8456797177. The cubic root of 722311081 is about 897.2388963281.

The spelling of 722311081 in words is "seven hundred twenty-two million, three hundred eleven thousand, eighty-one".