221422142440 has 64 divisors (see below), whose sum is σ = 505518952320. Its totient is φ = 87276000000.

The previous prime is 221422142377. The next prime is 221422142441. The reversal of 221422142440 is 44241224122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221422142399 and 221422142408.

It is not an unprimeable number, because it can be changed into a prime (221422142441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722565 + ... + 982315.

It is an arithmetic number, because the mean of its divisors is an integer number (7898733630).

Almost surely, 2^221422142440 is an apocalyptic number.

221422142440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221422142440 is an abundant number, since it is smaller than the sum of its proper divisors (284096809880).

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

221422142440 is a wasteful number, since it uses less digits than its factorization.

221422142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260074 (or 260070 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 221422142440 its reverse (44241224122), we get a palindrome (265663366562).

The spelling of 221422142440 in words is "two hundred twenty-one billion, four hundred twenty-two million, one hundred forty-two thousand, four hundred forty".