42544731 has 8 divisors (see below), whose sum is σ = 56885760. Its totient is φ = 28283432.

The previous prime is 42544681. The next prime is 42544763. The reversal of 42544731 is 13744524.

42544731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42544731 - 2⁷ = 42544603 is a prime.

It is a super-2 number, since 2×42544731² = 3620108271724722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42544031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18675 + ... + 20828.

It is an arithmetic number, because the mean of its divisors is an integer number (7110720).

Almost surely, 2^42544731 is an apocalyptic number.

42544731 is a deficient number, since it is larger than the sum of its proper divisors (14341029).

42544731 is a wasteful number, since it uses less digits than its factorization.

42544731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39865.

The product of its digits is 13440, while the sum is 30.

The square root of 42544731 is about 6522.6322140682. The cubic root of 42544731 is about 349.0989913580.

The spelling of 42544731 in words is "forty-two million, five hundred forty-four thousand, seven hundred thirty-one".