42219799 has 4 divisors (see below), whose sum is σ = 43581760. Its totient is φ = 40857840.

The previous prime is 42219797. The next prime is 42219811. The reversal of 42219799 is 99791224.

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 42219799 - 2¹ = 42219797 is a prime.

It is a super-2 number, since 2×42219799² = 3565022855200802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42219797) 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, 680934 + ... + 680995.

It is an arithmetic number, because the mean of its divisors is an integer number (10895440).

Almost surely, 2^42219799 is an apocalyptic number.

42219799 is a deficient number, since it is larger than the sum of its proper divisors (1361961).

42219799 is a wasteful number, since it uses less digits than its factorization.

42219799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361960.

The product of its digits is 81648, while the sum is 43.

The square root of 42219799 is about 6497.6764308482. The cubic root of 42219799 is about 348.2079805562.

The spelling of 42219799 in words is "forty-two million, two hundred nineteen thousand, seven hundred ninety-nine".