42188011 has 4 divisors (see below), whose sum is σ = 43642800. Its totient is φ = 40733224.

The previous prime is 42187997. The next prime is 42188017. The reversal of 42188011 is 11088124.

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 42188011 - 2⁵ = 42187979 is a prime.

It is a super-2 number, since 2×42188011² = 3559656544272242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42188017) 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, 727351 + ... + 727408.

It is an arithmetic number, because the mean of its divisors is an integer number (10910700).

Almost surely, 2^42188011 is an apocalyptic number.

42188011 is a deficient number, since it is larger than the sum of its proper divisors (1454789).

42188011 is a wasteful number, since it uses less digits than its factorization.

42188011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454788.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 42188011 is about 6495.2298650625. The cubic root of 42188011 is about 348.1205680571.

The spelling of 42188011 in words is "forty-two million, one hundred eighty-eight thousand, eleven".