22220155560 has 128 divisors (see below), whose sum is σ = 69685920000. Its totient is φ = 5657389056.

The previous prime is 22220155547. The next prime is 22220155567. The reversal of 22220155560 is 6555102222.

It is a super-2 number, since 2×22220155560² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (22220155567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1563366 + ... + 1577514.

It is an arithmetic number, because the mean of its divisors is an integer number (544421250).

Almost surely, 2^22220155560 is an apocalyptic number.

22220155560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22220155560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34842960000).

22220155560 is an abundant number, since it is smaller than the sum of its proper divisors (47465764440).

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

22220155560 is a wasteful number, since it uses less digits than its factorization.

22220155560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14755 (or 14751 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 22220155560 its reverse (6555102222), we get a palindrome (28775257782).

The spelling of 22220155560 in words is "twenty-two billion, two hundred twenty million, one hundred fifty-five thousand, five hundred sixty".