221362 has 4 divisors (see below), whose sum is σ = 332046. Its totient is φ = 110680.

The previous prime is 221327. The next prime is 221393. The reversal of 221362 is 263122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 263122 = 2 ⋅131561.

It can be written as a sum of positive squares in only one way, i.e., 168921 + 52441 = 411^2 + 229^2 .

It is a super-4 number, since 4×221362⁴ (a number of 22 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55339 + ... + 55342.

2²²¹³⁶² is an apocalyptic number.

221362 is a deficient number, since it is larger than the sum of its proper divisors (110684).

221362 is a wasteful number, since it uses less digits than its factorization.

221362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110683.

The product of its digits is 144, while the sum is 16.

The square root of 221362 is about 470.4912326495. The cubic root of 221362 is about 60.4924289868.

Adding to 221362 its reverse (263122), we get a palindrome (484484).

It can be divided in two parts, 2 and 21362, that multiplied together give a palindrome (42724).

The spelling of 221362 in words is "two hundred twenty-one thousand, three hundred sixty-two".