42543031 has 8 divisors (see below), whose sum is σ = 44788320. Its totient is φ = 40330752.

The previous prime is 42542977. The next prime is 42543041. The reversal of 42543031 is 13034524.

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

It is a cyclic number.

It is not a de Polignac number, because 42543031 - 2⁹ = 42542519 is a prime.

It is a super-2 number, since 2×42543031² = 3619818973333922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42542993 and 42543011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543041) 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, 5586 + ... + 10783.

It is an arithmetic number, because the mean of its divisors is an integer number (5598540).

Almost surely, 2^42543031 is an apocalyptic number.

42543031 is a deficient number, since it is larger than the sum of its proper divisors (2245289).

42543031 is a wasteful number, since it uses less digits than its factorization.

42543031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16505.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 42543031 is about 6522.5018972784. The cubic root of 42543031 is about 349.0943415367.

Adding to 42543031 its reverse (13034524), we get a palindrome (55577555).

The spelling of 42543031 in words is "forty-two million, five hundred forty-three thousand, thirty-one".