42342831 has 20 divisors (see below), whose sum is σ = 64729192. Its totient is φ = 27569808.

The previous prime is 42342823. The next prime is 42342877. The reversal of 42342831 is 13824324.

42342831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42342831 - 2³ = 42342823 is a prime.

It is a super-3 number, since 3×42342831³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42342795 and 42342804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42343831) 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 19 ways as a sum of consecutive naturals, for example, 2596 + ... + 9561.

Almost surely, 2^42342831 is an apocalyptic number.

42342831 is a deficient number, since it is larger than the sum of its proper divisors (22386361).

42342831 is a wasteful number, since it uses less digits than its factorization.

42342831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12212 (or 12203 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 42342831 is about 6507.1369280199. The cubic root of 42342831 is about 348.5458881944.

The spelling of 42342831 in words is "forty-two million, three hundred forty-two thousand, eight hundred thirty-one".