722220427 has 4 divisors (see below), whose sum is σ = 741739936. Its totient is φ = 702700920.

The previous prime is 722220383. The next prime is 722220439. The reversal of 722220427 is 724022227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722220427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722220395 and 722220404.

It is not an unprimeable number, because it can be changed into a prime (722220487) 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, 9759699 + ... + 9759772.

It is an arithmetic number, because the mean of its divisors is an integer number (185434984).

Almost surely, 2^722220427 is an apocalyptic number.

722220427 is a deficient number, since it is larger than the sum of its proper divisors (19519509).

722220427 is a wasteful number, since it uses less digits than its factorization.

722220427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19519508.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 722220427 is about 26874.1590938210. The cubic root of 722220427 is about 897.2013586245.

The spelling of 722220427 in words is "seven hundred twenty-two million, two hundred twenty thousand, four hundred twenty-seven".