223642 has 4 divisors (see below), whose sum is σ = 335466. Its totient is φ = 111820.

The previous prime is 223637. The next prime is 223667. The reversal of 223642 is 246322.

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

It can be written as a sum of positive squares in only one way, i.e., 184041 + 39601 = 429^2 + 199^2 .

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55909 + ... + 55912.

2²²³⁶⁴² is an apocalyptic number.

223642 is a deficient number, since it is larger than the sum of its proper divisors (111824).

223642 is a wasteful number, since it uses less digits than its factorization.

223642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111823.

The product of its digits is 576, while the sum is 19.

The square root of 223642 is about 472.9080248843. The cubic root of 223642 is about 60.6994080534.

Adding to 223642 its reverse (246322), we get a palindrome (469964).

It can be divided in two parts, 22364 and 2, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 223642 in words is "two hundred twenty-three thousand, six hundred forty-two".