2222721726156 has 36 divisors (see below), whose sum is σ = 5812289574000. Its totient is φ = 715358716128.

The previous prime is 2222721726143. The next prime is 2222721726157. The reversal of 2222721726156 is 6516271272222.

2222721726156 is a `hidden beast` number, since 2 + 2 + 2 + 2 + 7 + 21 + 7 + 2 + 615 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2222721726157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1064520856 + ... + 1064522943.

Almost surely, 2^{2222721726156} is an apocalyptic number.

It is an amenable number.

2222721726156 is an abundant number, since it is smaller than the sum of its proper divisors (3589567847844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2222721726156 is a wasteful number, since it uses less digits than its factorization.

2222721726156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129043838 (or 2129043833 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

Adding to 2222721726156 its reverse (6516271272222), we get a palindrome (8738992998378).

The spelling of 2222721726156 in words is "two trillion, two hundred twenty-two billion, seven hundred twenty-one million, seven hundred twenty-six thousand, one hundred fifty-six".