221498 has 4 divisors (see below), whose sum is σ = 332250. Its totient is φ = 110748.

The previous prime is 221497. The next prime is 221509. The reversal of 221498 is 894122.

221498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 139129 + 82369 = 373^2 + 287^2 .

It is a super-2 number, since 2×221498² = 98122728008, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221498.

It is not an unprimeable number, because it can be changed into a prime (221497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55373 + ... + 55376.

2²²¹⁴⁹⁸ is an apocalyptic number.

221498 is a deficient number, since it is larger than the sum of its proper divisors (110752).

221498 is a wasteful number, since it uses less digits than its factorization.

221498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110751.

The product of its digits is 1152, while the sum is 26.

The square root of 221498 is about 470.6357402493. The cubic root of 221498 is about 60.5048148617.

The spelling of 221498 in words is "two hundred twenty-one thousand, four hundred ninety-eight".