722165261 has 2 divisors, whose sum is σ = 722165262. Its totient is φ = 722165260.

The previous prime is 722165237. The next prime is 722165273. The reversal of 722165261 is 162561227.

722165261 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., 581292100 + 140873161 = 24110^2 + 11869^2 .

It is a cyclic number.

It is not a de Polignac number, because 722165261 - 2¹⁰ = 722164237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722165761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361082630 + 361082631.

It is an arithmetic number, because the mean of its divisors is an integer number (361082631).

Almost surely, 2^722165261 is an apocalyptic number.

It is an amenable number.

722165261 is a deficient number, since it is larger than the sum of its proper divisors (1).

722165261 is an equidigital number, since it uses as much as digits as its factorization.

722165261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 722165261 is about 26873.1326979197. The cubic root of 722165261 is about 897.1785141352.

It can be divided in two parts, 72216 and 5261, that added together give a palindrome (77477).

The spelling of 722165261 in words is "seven hundred twenty-two million, one hundred sixty-five thousand, two hundred sixty-one".