221304340332 has 36 divisors (see below), whose sum is σ = 559539194760. Its totient is φ = 73750838592.

The previous prime is 221304340291. The next prime is 221304340333. The reversal of 221304340332 is 233043403122.

221304340332 is a `hidden beast` number, since 2 + 21 + 304 + 3 + 4 + 0 + 332 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×221304340332² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221304340296 and 221304340305.

It is not an unprimeable number, because it can be changed into a prime (221304340333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563457 + ... + 871832.

It is an arithmetic number, because the mean of its divisors is an integer number (15542755410).

Almost surely, 2^221304340332 is an apocalyptic number.

It is an amenable number.

221304340332 is an abundant number, since it is smaller than the sum of its proper divisors (338234854428).

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

221304340332 is a wasteful number, since it uses less digits than its factorization.

221304340332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439582 (or 1439577 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 221304340332 its reverse (233043403122), we get a palindrome (454347743454).

The spelling of 221304340332 in words is "two hundred twenty-one billion, three hundred four million, three hundred forty thousand, three hundred thirty-two".