22274278221 has 16 divisors (see below), whose sum is σ = 32342950080. Its totient is φ = 13553232000.

The previous prime is 22274278219. The next prime is 22274278267. The reversal of 22274278221 is 12287247222.

It is a happy number.

It is not a de Polignac number, because 22274278221 - 2¹ = 22274278219 is a prime.

It is a super-2 number, since 2×22274278221² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 22274278221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22274278021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3205155 + ... + 3212096.

It is an arithmetic number, because the mean of its divisors is an integer number (2021434380).

Almost surely, 2^22274278221 is an apocalyptic number.

It is an amenable number.

22274278221 is a deficient number, since it is larger than the sum of its proper divisors (10068671859).

22274278221 is a wasteful number, since it uses less digits than its factorization.

22274278221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417356.

The product of its digits is 100352, while the sum is 39.

The spelling of 22274278221 in words is "twenty-two billion, two hundred seventy-four million, two hundred seventy-eight thousand, two hundred twenty-one".