221222323431 has 6 divisors (see below), whose sum is σ = 319543356080. Its totient is φ = 147481548948.

The previous prime is 221222323429. The next prime is 221222323481. The reversal of 221222323431 is 134323222122.

221222323431 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 223 + 2 + 3 + 431 = 666.

It is not a de Polignac number, because 221222323431 - 2¹ = 221222323429 is a prime.

It is a super-2 number, since 2×221222323431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221222323395 and 221222323404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222323481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12290129071 + ... + 12290129088.

Almost surely, 2^221222323431 is an apocalyptic number.

221222323431 is a deficient number, since it is larger than the sum of its proper divisors (98321032649).

221222323431 is a wasteful number, since it uses less digits than its factorization.

221222323431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24580258165 (or 24580258162 counting only the distinct ones).

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

Adding to 221222323431 its reverse (134323222122), we get a palindrome (355545545553).

The spelling of 221222323431 in words is "two hundred twenty-one billion, two hundred twenty-two million, three hundred twenty-three thousand, four hundred thirty-one".