42544243 has 16 divisors (see below), whose sum is σ = 50029056. Its totient is φ = 35421120.

The previous prime is 42544237. The next prime is 42544261. The reversal of 42544243 is 34244524.

It is not a de Polignac number, because 42544243 - 2⁹ = 42543731 is a prime.

It is a super-2 number, since 2×42544243² = 3620025224886098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42544283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84330 + ... + 84832.

It is an arithmetic number, because the mean of its divisors is an integer number (3126816).

Almost surely, 2^42544243 is an apocalyptic number.

42544243 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

42544243 is a deficient number, since it is larger than the sum of its proper divisors (7484813).

42544243 is a wasteful number, since it uses less digits than its factorization.

42544243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its digits is 15360, while the sum is 28.

The square root of 42544243 is about 6522.5948057502. The cubic root of 42544243 is about 349.0976565984.

Adding to 42544243 its reverse (34244524), we get a palindrome (76788767).

The spelling of 42544243 in words is "forty-two million, five hundred forty-four thousand, two hundred forty-three".