221646335230642 has 8 divisors (see below), whose sum is σ = 379965146109696. Its totient is φ = 94991286527412.

The previous prime is 221646335230631. The next prime is 221646335230657. The reversal of 221646335230642 is 246032533646122.

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

It is a super-3 number, since 3×221646335230642³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7915940543938 + ... + 7915940543965.

It is an arithmetic number, because the mean of its divisors is an integer number (47495643263712).

Almost surely, 2^{221646335230642} is an apocalyptic number.

221646335230642 is a deficient number, since it is larger than the sum of its proper divisors (158318810879054).

221646335230642 is a wasteful number, since it uses less digits than its factorization.

221646335230642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15831881087912.

The product of its (nonzero) digits is 7464960, while the sum is 49.

Adding to 221646335230642 its reverse (246032533646122), we get a palindrome (467678868876764).

The spelling of 221646335230642 in words is "two hundred twenty-one trillion, six hundred forty-six billion, three hundred thirty-five million, two hundred thirty thousand, six hundred forty-two".