221545355442143 has 4 divisors (see below), whose sum is σ = 221545595618760. Its totient is φ = 221545115265528.

The previous prime is 221545355442107. The next prime is 221545355442161. The reversal of 221545355442143 is 341244553545122.

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 221545355442143 - 2⁸ = 221545355441887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221545355442091 and 221545355442100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221545355462143) 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, 118699313 + ... + 120551306.

It is an arithmetic number, because the mean of its divisors is an integer number (55386398904690).

Almost surely, 2^{221545355442143} is an apocalyptic number.

221545355442143 is a deficient number, since it is larger than the sum of its proper divisors (240176617).

221545355442143 is an equidigital number, since it uses as much as digits as its factorization.

221545355442143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240176616.

The product of its digits is 11520000, while the sum is 50.

The spelling of 221545355442143 in words is "two hundred twenty-one trillion, five hundred forty-five billion, three hundred fifty-five million, four hundred forty-two thousand, one hundred forty-three".