223131009 has 4 divisors (see below), whose sum is σ = 297508016. Its totient is φ = 148754004.

The previous prime is 223130989. The next prime is 223131011. The reversal of 223131009 is 900131322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 223131009 - 2¹² = 223126913 is a prime.

It is a super-3 number, since 3×223131009³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223131019) 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, 37188499 + ... + 37188504.

It is an arithmetic number, because the mean of its divisors is an integer number (74377004).

Almost surely, 2^223131009 is an apocalyptic number.

It is an amenable number.

223131009 is a deficient number, since it is larger than the sum of its proper divisors (74377007).

223131009 is an equidigital number, since it uses as much as digits as its factorization.

223131009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74377006.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 223131009 is about 14937.5703847714. The cubic root of 223131009 is about 606.5314288509.

The spelling of 223131009 in words is "two hundred twenty-three million, one hundred thirty-one thousand, nine".