42204031 has 4 divisors (see below), whose sum is σ = 42577632. Its totient is φ = 41830432.

The previous prime is 42204017. The next prime is 42204049. The reversal of 42204031 is 13040224.

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 42204031 - 2²¹ = 40106879 is a prime.

It is a super-2 number, since 2×42204031² = 3562360465297922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42203996 and 42204014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42201031) 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, 186631 + ... + 186856.

It is an arithmetic number, because the mean of its divisors is an integer number (10644408).

Almost surely, 2^42204031 is an apocalyptic number.

42204031 is a deficient number, since it is larger than the sum of its proper divisors (373601).

42204031 is a wasteful number, since it uses less digits than its factorization.

42204031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373600.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42204031 is about 6496.4629607195. The cubic root of 42204031 is about 348.1646262751.

Adding to 42204031 its reverse (13040224), we get a palindrome (55244255).

The spelling of 42204031 in words is "forty-two million, two hundred four thousand, thirty-one".