42724331 has 8 divisors (see below), whose sum is σ = 48432720. Its totient is φ = 37361952.

The previous prime is 42724303. The next prime is 42724373. The reversal of 42724331 is 13342724.

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 42724331 - 2¹⁸ = 42462187 is a prime.

It is a super-2 number, since 2×42724331² = 3650736918795122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42724331.

It is not an unprimeable number, because it can be changed into a prime (42724391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86240 + ... + 86733.

It is an arithmetic number, because the mean of its divisors is an integer number (6054090).

Almost surely, 2^42724331 is an apocalyptic number.

42724331 is a deficient number, since it is larger than the sum of its proper divisors (5708389).

42724331 is a wasteful number, since it uses less digits than its factorization.

42724331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173005.

The product of its digits is 4032, while the sum is 26.

The square root of 42724331 is about 6536.3851630699. The cubic root of 42724331 is about 349.5895351393.

The spelling of 42724331 in words is "forty-two million, seven hundred twenty-four thousand, three hundred thirty-one".