221313341431 has 24 divisors (see below), whose sum is σ = 274192349184. Its totient is φ = 174906819360.

The previous prime is 221313341423. The next prime is 221313341437. The reversal of 221313341431 is 134143313122.

It is not a de Polignac number, because 221313341431 - 2³ = 221313341423 is a prime.

It is a super-2 number, since 2×221313341431² (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 221313341431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221313341437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 943866 + ... + 1154776.

It is an arithmetic number, because the mean of its divisors is an integer number (11424681216).

Almost surely, 2^221313341431 is an apocalyptic number.

221313341431 is a deficient number, since it is larger than the sum of its proper divisors (52879007753).

221313341431 is a wasteful number, since it uses less digits than its factorization.

221313341431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211831 (or 211818 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

Adding to 221313341431 its reverse (134143313122), we get a palindrome (355456654553).

The spelling of 221313341431 in words is "two hundred twenty-one billion, three hundred thirteen million, three hundred forty-one thousand, four hundred thirty-one".