721210052 has 12 divisors (see below), whose sum is σ = 1262904720. Its totient is φ = 360380136.

The previous prime is 721210033. The next prime is 721210069. The reversal of 721210052 is 250012127.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48902 + ... + 61917.

It is an arithmetic number, because the mean of its divisors is an integer number (105242060).

Almost surely, 2^721210052 is an apocalyptic number.

It is an amenable number.

721210052 is a deficient number, since it is larger than the sum of its proper divisors (541694668).

721210052 is a wasteful number, since it uses less digits than its factorization.

721210052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112450 (or 112448 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 721210052 is about 26855.3542519923. The cubic root of 721210052 is about 896.7827731767.

Adding to 721210052 its reverse (250012127), we get a palindrome (971222179).

The spelling of 721210052 in words is "seven hundred twenty-one million, two hundred ten thousand, fifty-two".