223215431 has 4 divisors (see below), whose sum is σ = 223761600. Its totient is φ = 222669264.

The previous prime is 223215427. The next prime is 223215479. The reversal of 223215431 is 134512322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 223215431 - 2² = 223215427 is a prime.

It is a super-3 number, since 3×223215431³ (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 = 223215397 and 223215406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223215481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272471 + ... + 273288.

It is an arithmetic number, because the mean of its divisors is an integer number (55940400).

Almost surely, 2^223215431 is an apocalyptic number.

223215431 is a deficient number, since it is larger than the sum of its proper divisors (546169).

223215431 is an equidigital number, since it uses as much as digits as its factorization.

223215431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546168.

The product of its digits is 1440, while the sum is 23.

The square root of 223215431 is about 14940.3959452218. The cubic root of 223215431 is about 606.6079132746.

Adding to 223215431 its reverse (134512322), we get a palindrome (357727753).

The spelling of 223215431 in words is "two hundred twenty-three million, two hundred fifteen thousand, four hundred thirty-one".