749282221 has 2 divisors, whose sum is σ = 749282222. Its totient is φ = 749282220.

The previous prime is 749282167. The next prime is 749282231. The reversal of 749282221 is 122282947.

749282221 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., 523952100 + 225330121 = 22890^2 + 15011^2 .

It is a cyclic number.

It is not a de Polignac number, because 749282221 - 2¹⁵ = 749249453 is a prime.

It is a super-2 number, since 2×749282221² = 1122847693413385682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749282231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374641110 + 374641111.

It is an arithmetic number, because the mean of its divisors is an integer number (374641111).

Almost surely, 2^749282221 is an apocalyptic number.

It is an amenable number.

749282221 is a deficient number, since it is larger than the sum of its proper divisors (1).

749282221 is an equidigital number, since it uses as much as digits as its factorization.

749282221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 749282221 is about 27373.0199466555. The cubic root of 749282221 is about 908.2703614585.

The spelling of 749282221 in words is "seven hundred forty-nine million, two hundred eighty-two thousand, two hundred twenty-one".