721600552 has 16 divisors (see below), whose sum is σ = 1360562400. Its totient is φ = 358783920.

The previous prime is 721600507. The next prime is 721600553. The reversal of 721600552 is 255006127.

It is a self number, because there is not a number n which added to its sum of digits gives 721600552.

It is not an unprimeable number, because it can be changed into a prime (721600553) 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, 250524 + ... + 253387.

It is an arithmetic number, because the mean of its divisors is an integer number (85035150).

Almost surely, 2^721600552 is an apocalyptic number.

It is an amenable number.

721600552 is a deficient number, since it is larger than the sum of its proper divisors (638961848).

721600552 is a wasteful number, since it uses less digits than its factorization.

721600552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504096 (or 504092 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 721600552 is about 26862.6236991103. The cubic root of 721600552 is about 896.9445986563.

Adding to 721600552 its reverse (255006127), we get a palindrome (976606679).

The spelling of 721600552 in words is "seven hundred twenty-one million, six hundred thousand, five hundred fifty-two".