722220277 has 2 divisors, whose sum is σ = 722220278. Its totient is φ = 722220276.

The previous prime is 722220259. The next prime is 722220281. The reversal of 722220277 is 772022227.

It is a happy number.

722220277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447787921 + 274432356 = 21161^2 + 16566^2 .

It is a cyclic number.

It is not a de Polignac number, because 722220277 - 2¹⁵ = 722187509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722220977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361110138 + 361110139.

It is an arithmetic number, because the mean of its divisors is an integer number (361110139).

Almost surely, 2^722220277 is an apocalyptic number.

It is an amenable number.

722220277 is a deficient number, since it is larger than the sum of its proper divisors (1).

722220277 is an equidigital number, since it uses as much as digits as its factorization.

722220277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 722220277 is about 26874.1563030358. The cubic root of 722220277 is about 897.2012965104.

The spelling of 722220277 in words is "seven hundred twenty-two million, two hundred twenty thousand, two hundred seventy-seven".