42919431 has 8 divisors (see below), whose sum is σ = 57370224. Its totient is φ = 28540800.

The previous prime is 42919421. The next prime is 42919433. The reversal of 42919431 is 13491924.

42919431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42919431 - 2¹⁸ = 42657287 is a prime.

It is a super-2 number, since 2×42919431² = 3684155114727522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42919392 and 42919401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42919433) 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 7 ways as a sum of consecutive naturals, for example, 16636 + ... + 19041.

It is an arithmetic number, because the mean of its divisors is an integer number (7171278).

Almost surely, 2^42919431 is an apocalyptic number.

42919431 is a deficient number, since it is larger than the sum of its proper divisors (14450793).

42919431 is a wasteful number, since it uses less digits than its factorization.

42919431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36081.

The product of its digits is 7776, while the sum is 33.

The square root of 42919431 is about 6551.2923152612. The cubic root of 42919431 is about 350.1208589415.

The spelling of 42919431 in words is "forty-two million, nine hundred nineteen thousand, four hundred thirty-one".