42108231 has 8 divisors (see below), whose sum is σ = 61248384. Its totient is φ = 25520120.

The previous prime is 42108229. The next prime is 42108233. The reversal of 42108231 is 13280124.

It is an interprime number because it is at equal distance from previous prime (42108229) and next prime (42108233).

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 42108231 - 2¹ = 42108229 is a prime.

It is a super-2 number, since 2×42108231² = 3546206235898722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42108198 and 42108207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42108233) 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, 637971 + ... + 638036.

It is an arithmetic number, because the mean of its divisors is an integer number (7656048).

Almost surely, 2^42108231 is an apocalyptic number.

42108231 is a deficient number, since it is larger than the sum of its proper divisors (19140153).

42108231 is a wasteful number, since it uses less digits than its factorization.

42108231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276021.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 42108231 is about 6489.0855287937. The cubic root of 42108231 is about 347.9009907926.

Adding to 42108231 its reverse (13280124), we get a palindrome (55388355).

The spelling of 42108231 in words is "forty-two million, one hundred eight thousand, two hundred thirty-one".