2222154512440 has 96 divisors (see below), whose sum is σ = 5316753589200. Its totient is φ = 835710033920.

The previous prime is 2222154512419. The next prime is 2222154512447. The reversal of 2222154512440 is 442154512222.

It is a super-2 number, since 2×2222154512440² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 2222154512396 and 2222154512405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222154512447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11125776 + ... + 11323744.

Almost surely, 2^{2222154512440} is an apocalyptic number.

2222154512440 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 2222154512440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2658376794600).

2222154512440 is an abundant number, since it is smaller than the sum of its proper divisors (3094599076760).

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

2222154512440 is a wasteful number, since it uses less digits than its factorization.

2222154512440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198985 (or 198964 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 34.

The spelling of 2222154512440 in words is "two trillion, two hundred twenty-two billion, one hundred fifty-four million, five hundred twelve thousand, four hundred forty".