221606500330331 has 8 divisors (see below), whose sum is σ = 221738367639984. Its totient is φ = 221474634531840.

The previous prime is 221606500330301. The next prime is 221606500330363. The reversal of 221606500330331 is 133033005606122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221606500330331 is a prime.

It is a super-2 number, since 2×221606500330331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221606500330291 and 221606500330300.

It is not an unprimeable number, because it can be changed into a prime (221606500330301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457460876 + ... + 457945046.

It is an arithmetic number, because the mean of its divisors is an integer number (27717295954998).

Almost surely, 2^{221606500330331} is an apocalyptic number.

221606500330331 is a deficient number, since it is larger than the sum of its proper divisors (131867309653).

221606500330331 is a wasteful number, since it uses less digits than its factorization.

221606500330331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755581.

The product of its (nonzero) digits is 58320, while the sum is 35.

Adding to 221606500330331 its reverse (133033005606122), we get a palindrome (354639505936453).

The spelling of 221606500330331 in words is "two hundred twenty-one trillion, six hundred six billion, five hundred million, three hundred thirty thousand, three hundred thirty-one".