42248531 has 8 divisors (see below), whose sum is σ = 46122720. Its totient is φ = 38463552.

The previous prime is 42248513. The next prime is 42248551. The reversal of 42248531 is 13584224.

It is a happy number.

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 42248531 - 2¹⁴ = 42232147 is a prime.

It is a super-2 number, since 2×42248531² = 3569876743315922, 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 = 42248494 and 42248503.

It is not an unprimeable number, because it can be changed into a prime (42248551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21311 + ... + 23208.

It is an arithmetic number, because the mean of its divisors is an integer number (5765340).

Almost surely, 2^42248531 is an apocalyptic number.

42248531 is a deficient number, since it is larger than the sum of its proper divisors (3874189).

42248531 is a wasteful number, since it uses less digits than its factorization.

42248531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44605.

The product of its digits is 7680, while the sum is 29.

The square root of 42248531 is about 6499.8869990178. The cubic root of 42248531 is about 348.2869517441.

The spelling of 42248531 in words is "forty-two million, two hundred forty-eight thousand, five hundred thirty-one".