221534131143 has 36 divisors (see below), whose sum is σ = 339769654008. Its totient is φ = 128309276160.

The previous prime is 221534131129. The next prime is 221534131163. The reversal of 221534131143 is 341131435122.

It is not a de Polignac number, because 221534131143 - 2⁸ = 221534130887 is a prime.

It is a super-2 number, since 2×221534131143² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221534131143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221534131163) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 609448 + ... + 902493.

Almost surely, 2^221534131143 is an apocalyptic number.

221534131143 is a deficient number, since it is larger than the sum of its proper divisors (118235522865).

221534131143 is a wasteful number, since it uses less digits than its factorization.

221534131143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512004 (or 1511974 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

Adding to 221534131143 its reverse (341131435122), we get a palindrome (562665566265).

The spelling of 221534131143 in words is "two hundred twenty-one billion, five hundred thirty-four million, one hundred thirty-one thousand, one hundred forty-three".