42219999 has 12 divisors (see below), whose sum is σ = 61425000. Its totient is φ = 27943344.

The previous prime is 42219979. The next prime is 42220081. The reversal of 42219999 is 99991224.

It is not a de Polignac number, because 42219999 - 2⁵ = 42219967 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

42219999 is a modest number, since divided by 9999 gives 4221 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42219949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15624 + ... + 18125.

It is an arithmetic number, because the mean of its divisors is an integer number (5118750).

Almost surely, 2^42219999 is an apocalyptic number.

42219999 is a deficient number, since it is larger than the sum of its proper divisors (19205001).

42219999 is a wasteful number, since it uses less digits than its factorization.

42219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33894 (or 33891 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 42219999 is about 6497.6918209469. The cubic root of 42219999 is about 348.2085303890.

The spelling of 42219999 in words is "forty-two million, two hundred nineteen thousand, nine hundred ninety-nine".