42244531 has 16 divisors (see below), whose sum is σ = 49420800. Its totient is φ = 35362368.

The previous prime is 42244519. The next prime is 42244549. The reversal of 42244531 is 13544224.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42244531 - 2¹⁷ = 42113459 is a prime.

It is a super-2 number, since 2×42244531² = 3569200798819922, 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 = 42244496 and 42244505.

It is not an unprimeable number, because it can be changed into a prime (42244231) 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, 96010 + ... + 96448.

It is an arithmetic number, because the mean of its divisors is an integer number (3088800).

Almost surely, 2^42244531 is an apocalyptic number.

42244531 is a deficient number, since it is larger than the sum of its proper divisors (7176269).

42244531 is a wasteful number, since it uses less digits than its factorization.

42244531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738.

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

The square root of 42244531 is about 6499.5792940774. The cubic root of 42244531 is about 348.2759597108.

Adding to 42244531 its reverse (13544224), we get a palindrome (55788755).

The spelling of 42244531 in words is "forty-two million, two hundred forty-four thousand, five hundred thirty-one".