42204131 has 4 divisors (see below), whose sum is σ = 42896064. Its totient is φ = 41512200.

The previous prime is 42204121. The next prime is 42204133. The reversal of 42204131 is 13140224.

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 42204131 - 2¹⁰ = 42203107 is a prime.

It is a super-2 number, since 2×42204131² = 3562377346930322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42204133) 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, 345875 + ... + 345996.

It is an arithmetic number, because the mean of its divisors is an integer number (10724016).

Almost surely, 2^42204131 is an apocalyptic number.

42204131 is a deficient number, since it is larger than the sum of its proper divisors (691933).

42204131 is an equidigital number, since it uses as much as digits as its factorization.

42204131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691932.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 42204131 is about 6496.4706572107. The cubic root of 42204131 is about 348.1649012601.

Adding to 42204131 its reverse (13140224), we get a palindrome (55344355).

The spelling of 42204131 in words is "forty-two million, two hundred four thousand, one hundred thirty-one".