42544881 has 6 divisors (see below), whose sum is σ = 61453730. Its totient is φ = 28363248.

The previous prime is 42544867. The next prime is 42544883. The reversal of 42544881 is 18844524.

42544881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33454656 + 9090225 = 5784^2 + 3015^2 .

It is not a de Polignac number, because 42544881 - 2¹¹ = 42542833 is a prime.

It is a super-2 number, since 2×42544881² = 3620133798608322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42544883) 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 5 ways as a sum of consecutive naturals, for example, 2363596 + ... + 2363613.

Almost surely, 2^42544881 is an apocalyptic number.

It is an amenable number.

42544881 is a deficient number, since it is larger than the sum of its proper divisors (18908849).

42544881 is a wasteful number, since it uses less digits than its factorization.

42544881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727215 (or 4727212 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 42544881 is about 6522.6437124835. The cubic root of 42544881 is about 349.0994016304.

The spelling of 42544881 in words is "forty-two million, five hundred forty-four thousand, eight hundred eighty-one".