722416257 has 6 divisors (see below), whose sum is σ = 1043490162. Its totient is φ = 481610832.

The previous prime is 722416169. The next prime is 722416283. The reversal of 722416257 is 752614227.

It is a happy number.

722416257 is a `hidden beast` number, since 7 + 2 + 24 + 1 + 625 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 680114241 + 42302016 = 26079^2 + 6504^2 .

It is not a de Polignac number, because 722416257 - 2¹⁸ = 722154113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722416657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40134228 + ... + 40134245.

It is an arithmetic number, because the mean of its divisors is an integer number (173915027).

Almost surely, 2^722416257 is an apocalyptic number.

It is an amenable number.

722416257 is a deficient number, since it is larger than the sum of its proper divisors (321073905).

722416257 is a wasteful number, since it uses less digits than its factorization.

722416257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80268479 (or 80268476 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 722416257 is about 26877.8023097127. The cubic root of 722416257 is about 897.2824433172.

The spelling of 722416257 in words is "seven hundred twenty-two million, four hundred sixteen thousand, two hundred fifty-seven".