223631431 has 4 divisors (see below), whose sum is σ = 223661664. Its totient is φ = 223601200.

The previous prime is 223631423. The next prime is 223631459. The reversal of 223631431 is 134136322.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 223631431 - 2³ = 223631423 is a prime.

It is a super-2 number, since 2×223631431² = 100022033862215522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223631396 and 223631405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223631491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4251 + ... + 21571.

It is an arithmetic number, because the mean of its divisors is an integer number (55915416).

Almost surely, 2^223631431 is an apocalyptic number.

223631431 is a deficient number, since it is larger than the sum of its proper divisors (30233).

223631431 is a wasteful number, since it uses less digits than its factorization.

223631431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30232.

The product of its digits is 2592, while the sum is 25.

The square root of 223631431 is about 14954.3114518857. The cubic root of 223631431 is about 606.9845184938.

Adding to 223631431 its reverse (134136322), we get a palindrome (357767753).

The spelling of 223631431 in words is "two hundred twenty-three million, six hundred thirty-one thousand, four hundred thirty-one".