221434342307 has 4 divisors (see below), whose sum is σ = 221436780576. Its totient is φ = 221431904040.

The previous prime is 221434342291. The next prime is 221434342309. The reversal of 221434342307 is 703243434122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221434342307 - 2⁴ = 221434342291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221434342309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077419 + ... + 1266372.

It is an arithmetic number, because the mean of its divisors is an integer number (55359195144).

Almost surely, 2^221434342307 is an apocalyptic number.

221434342307 is a deficient number, since it is larger than the sum of its proper divisors (2438269).

221434342307 is an equidigital number, since it uses as much as digits as its factorization.

221434342307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438268.

The product of its (nonzero) digits is 96768, while the sum is 35.

Adding to 221434342307 its reverse (703243434122), we get a palindrome (924677776429).

The spelling of 221434342307 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-two thousand, three hundred seven".