223123431 has 16 divisors (see below), whose sum is σ = 312650624. Its totient is φ = 141359904.

The previous prime is 223123423. The next prime is 223123451. The reversal of 223123431 is 134321322.

It is not a de Polignac number, because 223123431 - 2³ = 223123423 is a prime.

It is a super-3 number, since 3×223123431³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223123398 and 223123407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223123451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18601 + ... + 28146.

It is an arithmetic number, because the mean of its divisors is an integer number (19540664).

Almost surely, 2^223123431 is an apocalyptic number.

223123431 is a deficient number, since it is larger than the sum of its proper divisors (89527193).

223123431 is a wasteful number, since it uses less digits than its factorization.

223123431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46830.

The product of its digits is 864, while the sum is 21.

The square root of 223123431 is about 14937.3167269092. The cubic root of 223123431 is about 606.5245624107.

Adding to 223123431 its reverse (134321322), we get a palindrome (357444753).

The spelling of 223123431 in words is "two hundred twenty-three million, one hundred twenty-three thousand, four hundred thirty-one".