720722522 has 8 divisors (see below), whose sum is σ = 1164244116. Its totient is φ = 332641152.

The previous prime is 720722507. The next prime is 720722533. The reversal of 720722522 is 225227027.

It can be written as a sum of positive squares in 2 ways, for example, as 716686441 + 4036081 = 26771^2 + 2009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 4.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13860023 + ... + 13860074.

Almost surely, 2^720722522 is an apocalyptic number.

720722522 is a deficient number, since it is larger than the sum of its proper divisors (443521594).

720722522 is a wasteful number, since it uses less digits than its factorization.

720722522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27720112.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 720722522 is about 26846.2757566110. The cubic root of 720722522 is about 896.5806558891.

Adding to 720722522 its reverse (225227027), we get a palindrome (945949549).

The spelling of 720722522 in words is "seven hundred twenty million, seven hundred twenty-two thousand, five hundred twenty-two".