42718831 has 4 divisors (see below), whose sum is σ = 43873432. Its totient is φ = 41564232.

The previous prime is 42718829. The next prime is 42718847. The reversal of 42718831 is 13881724.

It is a happy number.

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 42718831 - 2¹ = 42718829 is a prime.

It is a super-2 number, since 2×42718831² = 3649797044013122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42718861) 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, 577245 + ... + 577318.

It is an arithmetic number, because the mean of its divisors is an integer number (10968358).

Almost surely, 2^42718831 is an apocalyptic number.

42718831 is a deficient number, since it is larger than the sum of its proper divisors (1154601).

42718831 is a wasteful number, since it uses less digits than its factorization.

42718831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154600.

The product of its digits is 10752, while the sum is 34.

The square root of 42718831 is about 6535.9644276878. The cubic root of 42718831 is about 349.5745333444.

The spelling of 42718831 in words is "forty-two million, seven hundred eighteen thousand, eight hundred thirty-one".