722213637 has 4 divisors (see below), whose sum is σ = 962951520. Its totient is φ = 481475756.

The previous prime is 722213629. The next prime is 722213707. The reversal of 722213637 is 736312227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 722213637 - 2³ = 722213629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722213598 and 722213607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722213537) 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, 120368937 + ... + 120368942.

It is an arithmetic number, because the mean of its divisors is an integer number (240737880).

Almost surely, 2^722213637 is an apocalyptic number.

It is an amenable number.

722213637 is a deficient number, since it is larger than the sum of its proper divisors (240737883).

722213637 is a wasteful number, since it uses less digits than its factorization.

722213637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240737882.

The product of its digits is 21168, while the sum is 33.

The square root of 722213637 is about 26874.0327639899. The cubic root of 722213637 is about 897.1985469176.

The spelling of 722213637 in words is "seven hundred twenty-two million, two hundred thirteen thousand, six hundred thirty-seven".