223442409 has 4 divisors (see below), whose sum is σ = 297923216. Its totient is φ = 148961604.

The previous prime is 223442393. The next prime is 223442437. The reversal of 223442409 is 904244322.

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 223442409 - 2⁴ = 223442393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223442449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37240399 + ... + 37240404.

It is an arithmetic number, because the mean of its divisors is an integer number (74480804).

Almost surely, 2^223442409 is an apocalyptic number.

It is an amenable number.

223442409 is a deficient number, since it is larger than the sum of its proper divisors (74480807).

223442409 is an equidigital number, since it uses as much as digits as its factorization.

223442409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74480806.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 223442409 is about 14947.9901324559. The cubic root of 223442409 is about 606.8134546321.

It can be divided in two parts, 22344 and 2409, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 223442409 in words is "two hundred twenty-three million, four hundred forty-two thousand, four hundred nine".