42307431 has 8 divisors (see below), whose sum is σ = 56454144. Its totient is φ = 28182840.

The previous prime is 42307387. The next prime is 42307439. The reversal of 42307431 is 13470324.

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

It is not a de Polignac number, because 42307431 - 2¹¹ = 42305383 is a prime.

It is a super-2 number, since 2×42307431² = 3579837435639522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42307439) 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, 381 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (7056768).

Almost surely, 2^42307431 is an apocalyptic number.

42307431 is a deficient number, since it is larger than the sum of its proper divisors (14146713).

42307431 is a wasteful number, since it uses less digits than its factorization.

42307431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 42307431 is about 6504.4162689668. The cubic root of 42307431 is about 348.4487291695.

Adding to 42307431 its reverse (13470324), we get a palindrome (55777755).

The spelling of 42307431 in words is "forty-two million, three hundred seven thousand, four hundred thirty-one".