224279819 has 4 divisors (see below), whose sum is σ = 236084040. Its totient is φ = 212475600.

The previous prime is 224279807. The next prime is 224279851. The reversal of 224279819 is 918972422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918972422 = 2 ⋅459486211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224279819 is a prime.

It is a super-2 number, since 2×224279819² = 100602874421345522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 224279819.

It is not an unprimeable number, because it can be changed into a prime (224279899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5902082 + ... + 5902119.

It is an arithmetic number, because the mean of its divisors is an integer number (59021010).

Almost surely, 2^224279819 is an apocalyptic number.

224279819 is a deficient number, since it is larger than the sum of its proper divisors (11804221).

224279819 is a wasteful number, since it uses less digits than its factorization.

224279819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11804220.

The product of its digits is 145152, while the sum is 44.

The square root of 224279819 is about 14975.9747262073. The cubic root of 224279819 is about 607.5705746501.

The spelling of 224279819 in words is "two hundred twenty-four million, two hundred seventy-nine thousand, eight hundred nineteen".