42347131 has 4 divisors (see below), whose sum is σ = 43331992. Its totient is φ = 41362272.

The previous prime is 42347087. The next prime is 42347167. The reversal of 42347131 is 13174324.

42347131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42347131 - 2¹³ = 42338939 is a prime.

It is a super-2 number, since 2×42347131² = 3586559007862322, 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 = 42347096 and 42347105.

It is not an unprimeable number, because it can be changed into a prime (42344131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492366 + ... + 492451.

It is an arithmetic number, because the mean of its divisors is an integer number (10832998).

Almost surely, 2^42347131 is an apocalyptic number.

42347131 is a deficient number, since it is larger than the sum of its proper divisors (984861).

42347131 is an equidigital number, since it uses as much as digits as its factorization.

42347131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984860.

The product of its digits is 2016, while the sum is 25.

The square root of 42347131 is about 6507.4673260801. The cubic root of 42347131 is about 348.5576863080.

The spelling of 42347131 in words is "forty-two million, three hundred forty-seven thousand, one hundred thirty-one".