42228499 has 4 divisors (see below), whose sum is σ = 42255136. Its totient is φ = 42201864.

The previous prime is 42228497. The next prime is 42228503. The reversal of 42228499 is 99482224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42228499 - 2¹ = 42228497 is a prime.

It is a super-2 number, since 2×42228499² = 3566492255586002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42228497) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10779 + ... + 14164.

It is an arithmetic number, because the mean of its divisors is an integer number (10563784).

Almost surely, 2^42228499 is an apocalyptic number.

42228499 is a deficient number, since it is larger than the sum of its proper divisors (26637).

42228499 is a wasteful number, since it uses less digits than its factorization.

42228499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26636.

The product of its digits is 82944, while the sum is 40.

The square root of 42228499 is about 6498.3458664494. The cubic root of 42228499 is about 348.2318966764.

It can be divided in two parts, 4222 and 8499, that added together give a palindrome (12721).

The spelling of 42228499 in words is "forty-two million, two hundred twenty-eight thousand, four hundred ninety-nine".