721202056 has 16 divisors (see below), whose sum is σ = 1361984400. Its totient is φ = 358006224.

The previous prime is 721202021. The next prime is 721202059. The reversal of 721202056 is 650202127.

It is a self number, because there is not a number n which added to its sum of digits gives 721202056.

It is not an unprimeable number, because it can be changed into a prime (721202059) 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, 323170 + ... + 325393.

It is an arithmetic number, because the mean of its divisors is an integer number (85124025).

Almost surely, 2^721202056 is an apocalyptic number.

It is an amenable number.

721202056 is a deficient number, since it is larger than the sum of its proper divisors (640782344).

721202056 is a wasteful number, since it uses less digits than its factorization.

721202056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648708 (or 648704 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 721202056 is about 26855.2053799631. The cubic root of 721202056 is about 896.7794589774.

The spelling of 721202056 in words is "seven hundred twenty-one million, two hundred two thousand, fifty-six".