720145522 has 8 divisors (see below), whose sum is σ = 1080534636. Its totient is φ = 359967312.

The previous prime is 720145507. The next prime is 720145529. The reversal of 720145522 is 225541027.

720145522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 666724041 + 53421481 = 25821^2 + 7309^2 .

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

It is not an unprimeable number, because it can be changed into a prime (720145529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43893 + ... + 58024.

Almost surely, 2^720145522 is an apocalyptic number.

720145522 is a deficient number, since it is larger than the sum of its proper divisors (360389114).

720145522 is a wasteful number, since it uses less digits than its factorization.

720145522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105452.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 720145522 is about 26835.5272353647. The cubic root of 720145522 is about 896.3413288532.

Adding to 720145522 its reverse (225541027), we get a palindrome (945686549).

The spelling of 720145522 in words is "seven hundred twenty million, one hundred forty-five thousand, five hundred twenty-two".