2221722547 has 4 divisors (see below), whose sum is σ = 2423697336. Its totient is φ = 2019747760.

The previous prime is 2221722523. The next prime is 2221722593. The reversal of 2221722547 is 7452271222.

2221722547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-2221722547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221722247) 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, 100987378 + ... + 100987399.

It is an arithmetic number, because the mean of its divisors is an integer number (605924334).

Almost surely, 2^2221722547 is an apocalyptic number.

2221722547 is a deficient number, since it is larger than the sum of its proper divisors (201974789).

2221722547 is a wasteful number, since it uses less digits than its factorization.

2221722547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201974788.

The product of its digits is 31360, while the sum is 34.

The square root of 2221722547 is about 47135.1519250760. The cubic root of 2221722547 is about 1304.8580649399.

Adding to 2221722547 its reverse (7452271222), we get a palindrome (9673993769).

The spelling of 2221722547 in words is "two billion, two hundred twenty-one million, seven hundred twenty-two thousand, five hundred forty-seven".