221434342320 has 40 divisors (see below), whose sum is σ = 686446461936. Its totient is φ = 59049157888.

The previous prime is 221434342309. The next prime is 221434342351. The reversal of 221434342320 is 23243434122.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461321307 + ... + 461321786.

Almost surely, 2^221434342320 is an apocalyptic number.

221434342320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221434342320 is an abundant number, since it is smaller than the sum of its proper divisors (465012119616).

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

221434342320 is a wasteful number, since it uses less digits than its factorization.

221434342320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922643109 (or 922643103 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 221434342320 its reverse (23243434122), we get a palindrome (244677776442).

The spelling of 221434342320 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-two thousand, three hundred twenty".