220243431321 has 16 divisors (see below), whose sum is σ = 326316323520. Its totient is φ = 146815562880.

The previous prime is 220243431283. The next prime is 220243431341. The reversal of 220243431321 is 123134342022.

220243431321 is a `hidden beast` number, since 2 + 202 + 4 + 3 + 431 + 3 + 21 = 666.

It is not a de Polignac number, because 220243431321 - 2⁷ = 220243431193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (220243431341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65880 + ... + 666953.

It is an arithmetic number, because the mean of its divisors is an integer number (20394770220).

Almost surely, 2^220243431321 is an apocalyptic number.

It is an amenable number.

220243431321 is a deficient number, since it is larger than the sum of its proper divisors (106072892199).

220243431321 is a wasteful number, since it uses less digits than its factorization.

220243431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743973 (or 743967 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 220243431321 its reverse (123134342022), we get a palindrome (343377773343).

The spelling of 220243431321 in words is "two hundred twenty billion, two hundred forty-three million, four hundred thirty-one thousand, three hundred twenty-one".