42031943 has 4 divisors (see below), whose sum is σ = 42465360. Its totient is φ = 41598528.

The previous prime is 42031937. The next prime is 42031949. The reversal of 42031943 is 34913024.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42031937) and next prime (42031949).

It is a cyclic number.

It is not a de Polignac number, because 42031943 - 2¹⁴ = 42015559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031949) 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, 216563 + ... + 216756.

It is an arithmetic number, because the mean of its divisors is an integer number (10616340).

Almost surely, 2^42031943 is an apocalyptic number.

42031943 is a deficient number, since it is larger than the sum of its proper divisors (433417).

42031943 is an equidigital number, since it uses as much as digits as its factorization.

42031943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433416.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 42031943 is about 6483.2046859559. The cubic root of 42031943 is about 347.6907649505.

Adding to 42031943 its reverse (34913024), we get a palindrome (76944967).

The spelling of 42031943 in words is "forty-two million, thirty-one thousand, nine hundred forty-three".