221622227947 has 4 divisors (see below), whose sum is σ = 223109625600. Its totient is φ = 220134830296.

The previous prime is 221622227933. The next prime is 221622228007. The reversal of 221622227947 is 749722226122.

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-221622227947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221622227897 and 221622227906.

It is not an unprimeable number, because it can be changed into a prime (221622227917) 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, 743698603 + ... + 743698900.

It is an arithmetic number, because the mean of its divisors is an integer number (55777406400).

Almost surely, 2^221622227947 is an apocalyptic number.

221622227947 is a deficient number, since it is larger than the sum of its proper divisors (1487397653).

221622227947 is a wasteful number, since it uses less digits than its factorization.

221622227947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487397652.

The product of its digits is 677376, while the sum is 46.

The spelling of 221622227947 in words is "two hundred twenty-one billion, six hundred twenty-two million, two hundred twenty-seven thousand, nine hundred forty-seven".