221630445543 has 32 divisors (see below), whose sum is σ = 328346161920. Its totient is φ = 132104021760.

The previous prime is 221630445503. The next prime is 221630445571. The reversal of 221630445543 is 345544036122.

It is not a de Polignac number, because 221630445543 - 2⁸ = 221630445287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221630445503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276321 + ... + 720842.

It is an arithmetic number, because the mean of its divisors is an integer number (10260817560).

Almost surely, 2^221630445543 is an apocalyptic number.

221630445543 is a deficient number, since it is larger than the sum of its proper divisors (106715716377).

221630445543 is a wasteful number, since it uses less digits than its factorization.

221630445543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997359.

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 221630445543 in words is "two hundred twenty-one billion, six hundred thirty million, four hundred forty-five thousand, five hundred forty-three".