42356431 has 8 divisors (see below), whose sum is σ = 45679760. Its totient is φ = 39042432.

The previous prime is 42356423. The next prime is 42356437. The reversal of 42356431 is 13465324.

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

It is not a de Polignac number, because 42356431 - 2³ = 42356423 is a prime.

It is a super-2 number, since 2×42356431² = 3588134494115522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42356431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42356437) 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, 9271 + ... + 13063.

It is an arithmetic number, because the mean of its divisors is an integer number (5709970).

Almost surely, 2^42356431 is an apocalyptic number.

42356431 is a deficient number, since it is larger than the sum of its proper divisors (3323329).

42356431 is a wasteful number, since it uses less digits than its factorization.

42356431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665.

The product of its digits is 8640, while the sum is 28.

The square root of 42356431 is about 6508.1818505632. The cubic root of 42356431 is about 348.5832004269.

The spelling of 42356431 in words is "forty-two million, three hundred fifty-six thousand, four hundred thirty-one".