42221799 has 12 divisors (see below), whose sum is σ = 61071400. Its totient is φ = 28108944.

The previous prime is 42221791. The next prime is 42221801. The reversal of 42221799 is 99712224.

It is not a de Polignac number, because 42221799 - 2³ = 42221791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221791) 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, 4632 + ... + 10290.

Almost surely, 2^42221799 is an apocalyptic number.

42221799 is a deficient number, since it is larger than the sum of its proper divisors (18849601).

42221799 is a wasteful number, since it uses less digits than its factorization.

42221799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494 (or 6491 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 42221799 is about 6497.8303301948. The cubic root of 42221799 is about 348.2134788057.

It can be divided in two parts, 42 and 221799, that added together give a square (221841 = 471²).

The spelling of 42221799 in words is "forty-two million, two hundred twenty-one thousand, seven hundred ninety-nine".