223722 has 20 divisors (see below), whose sum is σ = 501666. Its totient is φ = 74520.

The previous prime is 223711. The next prime is 223747. The reversal of 223722 is 227322.

It can be written as a sum of positive squares in only one way, i.e., 194481 + 29241 = 441^2 + 171^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 223695 and 223704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 529 + ... + 852.

2²²³⁷²² is an apocalyptic number.

223722 is an abundant number, since it is smaller than the sum of its proper divisors (277944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223722 is a wasteful number, since it uses less digits than its factorization.

223722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395 (or 1386 counting only the distinct ones).

The product of its digits is 336, while the sum is 18.

The square root of 223722 is about 472.9926003650. The cubic root of 223722 is about 60.7066448780.

Subtracting 223722 from its reverse (227322), we obtain a square (3600 = 60²).

It can be divided in two parts, 22372 and 2, that multiplied together give a palindrome (44744).

The spelling of 223722 in words is "two hundred twenty-three thousand, seven hundred twenty-two", and thus it is an iban number.