22221551240240 has 160 divisors (see below), whose sum is σ = 57815452199232. Its totient is φ = 7872712704000.

The previous prime is 22221551240233. The next prime is 22221551240257. The reversal of 22221551240240 is 4204215512222.

It is a super-2 number, since 2×22221551240240² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22221551240197 and 22221551240206.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26026520 + ... + 26866760.

Almost surely, 2^{22221551240240} is an apocalyptic number.

22221551240240 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 22221551240240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28907726099616).

22221551240240 is an abundant number, since it is smaller than the sum of its proper divisors (35593900958992).

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

22221551240240 is a wasteful number, since it uses less digits than its factorization.

22221551240240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841039 (or 841033 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 22221551240240 its reverse (4204215512222), we get a palindrome (26425766752462).

The spelling of 22221551240240 in words is "twenty-two trillion, two hundred twenty-one billion, five hundred fifty-one million, two hundred forty thousand, two hundred forty".