42340231 has 4 divisors (see below), whose sum is σ = 42610072. Its totient is φ = 42070392.

The previous prime is 42340223. The next prime is 42340241. The reversal of 42340231 is 13204324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42340231 - 2³ = 42340223 is a prime.

It is a super-2 number, since 2×42340231² = 3585390322266722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42340199 and 42340208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42340241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134685 + ... + 134998.

It is an arithmetic number, because the mean of its divisors is an integer number (10652518).

Almost surely, 2^42340231 is an apocalyptic number.

42340231 is a deficient number, since it is larger than the sum of its proper divisors (269841).

42340231 is a wasteful number, since it uses less digits than its factorization.

42340231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269840.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42340231 is about 6506.9371443099. The cubic root of 42340231 is about 348.5387540638.

Adding to 42340231 its reverse (13204324), we get a palindrome (55544555).

The spelling of 42340231 in words is "forty-two million, three hundred forty thousand, two hundred thirty-one".