42143231 has 8 divisors (see below), whose sum is σ = 45588144. Its totient is φ = 38727360.

The previous prime is 42143219. The next prime is 42143249. The reversal of 42143231 is 13234124.

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 42143231 - 2¹⁰ = 42142207 is a prime.

It is a super-2 number, since 2×42143231² = 3552103838238722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42143281) 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, 4190 + ... + 10091.

It is an arithmetic number, because the mean of its divisors is an integer number (5698518).

Almost surely, 2^42143231 is an apocalyptic number.

42143231 is a deficient number, since it is larger than the sum of its proper divisors (3444913).

42143231 is a wasteful number, since it uses less digits than its factorization.

42143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14521.

The product of its digits is 576, while the sum is 20.

The square root of 42143231 is about 6491.7818047128. The cubic root of 42143231 is about 347.9973548705.

Adding to 42143231 its reverse (13234124), we get a palindrome (55377355).

The spelling of 42143231 in words is "forty-two million, one hundred forty-three thousand, two hundred thirty-one".