42817231 has 8 divisors (see below), whose sum is σ = 44279424. Its totient is φ = 41360160.

The previous prime is 42817217. The next prime is 42817249. The reversal of 42817231 is 13271824.

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 42817231 - 2⁵ = 42817199 is a prime.

It is a super-2 number, since 2×42817231² = 3666630541014722, 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 42817231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42818231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23841 + ... + 25573.

It is an arithmetic number, because the mean of its divisors is an integer number (5534928).

Almost surely, 2^42817231 is an apocalyptic number.

42817231 is a deficient number, since it is larger than the sum of its proper divisors (1462193).

42817231 is a wasteful number, since it uses less digits than its factorization.

42817231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its digits is 2688, while the sum is 28.

The square root of 42817231 is about 6543.4876786008. The cubic root of 42817231 is about 349.8427347889.

The spelling of 42817231 in words is "forty-two million, eight hundred seventeen thousand, two hundred thirty-one".