42231544 has 8 divisors (see below), whose sum is σ = 79184160. Its totient is φ = 21115768.

The previous prime is 42231499. The next prime is 42231559. The reversal of 42231544 is 44513224.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639464 + ... + 2639479.

It is an arithmetic number, because the mean of its divisors is an integer number (9898020).

Almost surely, 2^42231544 is an apocalyptic number.

It is an amenable number.

42231544 is a deficient number, since it is larger than the sum of its proper divisors (36952616).

42231544 is a wasteful number, since it uses less digits than its factorization.

42231544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278949 (or 5278945 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 42231544 is about 6498.5801526180. The cubic root of 42231544 is about 348.2402665425.

Adding to 42231544 its reverse (44513224), we get a palindrome (86744768).

The spelling of 42231544 in words is "forty-two million, two hundred thirty-one thousand, five hundred forty-four".