223442405 has 12 divisors (see below), whose sum is σ = 274522860. Its totient is φ = 174589632.

The previous prime is 223442393. The next prime is 223442437. The reversal of 223442405 is 504244322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 164198596 + 59243809 = 12814^2 + 7697^2 .

It is a de Polignac number, because none of the positive numbers 2^k-223442405 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2840 + ... + 21329.

It is an arithmetic number, because the mean of its divisors is an integer number (22876905).

Almost surely, 2^223442405 is an apocalyptic number.

It is an amenable number.

223442405 is a deficient number, since it is larger than the sum of its proper divisors (51080455).

223442405 is an equidigital number, since it uses as much as digits as its factorization.

223442405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24260 (or 24217 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 223442405 is about 14947.9899986587. The cubic root of 223442405 is about 606.8134510111.

Adding to 223442405 its reverse (504244322), we get a palindrome (727686727).

The spelling of 223442405 in words is "two hundred twenty-three million, four hundred forty-two thousand, four hundred five".