22221561025156 has 24 divisors (see below), whose sum is σ = 39920908285440. Its totient is φ = 10818036966912.

The previous prime is 22221561025051. The next prime is 22221561025171. The reversal of 22221561025156 is 65152016512222.

It is a super-3 number, since 3×22221561025156³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306180796 + ... + 306253363.

It is an arithmetic number, because the mean of its divisors is an integer number (1663371178560).

Almost surely, 2^{22221561025156} is an apocalyptic number.

It is an amenable number.

22221561025156 is a deficient number, since it is larger than the sum of its proper divisors (17699347260284).

22221561025156 is a wasteful number, since it uses less digits than its factorization.

22221561025156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612434403 (or 612434401 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

Adding to 22221561025156 its reverse (65152016512222), we get a palindrome (87373577537378).

The spelling of 22221561025156 in words is "twenty-two trillion, two hundred twenty-one billion, five hundred sixty-one million, twenty-five thousand, one hundred fifty-six".