42159231 has 8 divisors (see below), whose sum is σ = 62458160. Its totient is φ = 28106136.

The previous prime is 42159223. The next prime is 42159251. The reversal of 42159231 is 13295124.

42159231 is a `hidden beast` number, since 42 + 1 + 592 + 31 = 666.

It is not a de Polignac number, because 42159231 - 2³ = 42159223 is a prime.

It is a super-2 number, since 2×42159231² = 3554801517022722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1561453 = 42159231 / (4 + 2 + 1 + 5 + 9 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42159195 and 42159204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42159251) 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, 780700 + ... + 780753.

It is an arithmetic number, because the mean of its divisors is an integer number (7807270).

Almost surely, 2^42159231 is an apocalyptic number.

42159231 is a deficient number, since it is larger than the sum of its proper divisors (20298929).

42159231 is a wasteful number, since it uses less digits than its factorization.

42159231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561462 (or 1561456 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 42159231 is about 6493.0140150781. The cubic root of 42159231 is about 348.0413892508.

The spelling of 42159231 in words is "forty-two million, one hundred fifty-nine thousand, two hundred thirty-one".