22191298 has 4 divisors (see below), whose sum is σ = 33286950. Its totient is φ = 11095648.

The previous prime is 22191287. The next prime is 22191329. The reversal of 22191298 is 89219122.

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., 21874329 + 316969 = 4677^2 + 563^2 .

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 as a sum of consecutive naturals, namely, 5547823 + ... + 5547826.

Almost surely, 2^22191298 is an apocalyptic number.

22191298 is a deficient number, since it is larger than the sum of its proper divisors (11095652).

22191298 is a wasteful number, since it uses less digits than its factorization.

22191298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11095651.

The product of its digits is 5184, while the sum is 34.

The square root of 22191298 is about 4710.7640569233. The cubic root of 22191298 is about 281.0137487310.

It can be divided in two parts, 221 and 91298, that added together give a palindrome (91519).

The spelling of 22191298 in words is "twenty-two million, one hundred ninety-one thousand, two hundred ninety-eight".