42718431 has 8 divisors (see below), whose sum is σ = 65094784. Its totient is φ = 24410520.

The previous prime is 42718409. The next prime is 42718439. The reversal of 42718431 is 13481724.

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

It is not a de Polignac number, because 42718431 - 2⁶ = 42718367 is a prime.

It is a super-2 number, since 2×42718431² = 3649728694203522, 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 (42718439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017085 + ... + 1017126.

It is an arithmetic number, because the mean of its divisors is an integer number (8136848).

Almost surely, 2^42718431 is an apocalyptic number.

42718431 is a deficient number, since it is larger than the sum of its proper divisors (22376353).

42718431 is a wasteful number, since it uses less digits than its factorization.

42718431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034221.

The product of its digits is 5376, while the sum is 30.

The square root of 42718431 is about 6535.9338276944. The cubic root of 42718431 is about 349.5734422545.

The spelling of 42718431 in words is "forty-two million, seven hundred eighteen thousand, four hundred thirty-one".