221245555343 has 4 divisors (see below), whose sum is σ = 221326570728. Its totient is φ = 221164539960.

The previous prime is 221245555313. The next prime is 221245555367. The reversal of 221245555343 is 343555542122.

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 221245555343 - 2⁸ = 221245555087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221245555343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221245555313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40503596 + ... + 40509057.

It is an arithmetic number, because the mean of its divisors is an integer number (55331642682).

Almost surely, 2^221245555343 is an apocalyptic number.

221245555343 is a deficient number, since it is larger than the sum of its proper divisors (81015385).

221245555343 is an equidigital number, since it uses as much as digits as its factorization.

221245555343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81015384.

The product of its digits is 720000, while the sum is 41.

The spelling of 221245555343 in words is "two hundred twenty-one billion, two hundred forty-five million, five hundred fifty-five thousand, three hundred forty-three".