221620263143 has 4 divisors (see below), whose sum is σ = 221622348960. Its totient is φ = 221618177328.

The previous prime is 221620263127. The next prime is 221620263149. The reversal of 221620263143 is 341362026122.

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 221620263143 - 2⁴ = 221620263127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221620263149) 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, 874463 + ... + 1099056.

It is an arithmetic number, because the mean of its divisors is an integer number (55405587240).

Almost surely, 2^221620263143 is an apocalyptic number.

221620263143 is a deficient number, since it is larger than the sum of its proper divisors (2085817).

221620263143 is a wasteful number, since it uses less digits than its factorization.

221620263143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085816.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 221620263143 its reverse (341362026122), we get a palindrome (562982289265).

The spelling of 221620263143 in words is "two hundred twenty-one billion, six hundred twenty million, two hundred sixty-three thousand, one hundred forty-three".