238343131 has 4 divisors (see below), whose sum is σ = 256677232. Its totient is φ = 220009032.

The previous prime is 238343117. The next prime is 238343137. The reversal of 238343131 is 131343832.

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 238343131 - 2⁵ = 238343099 is a prime.

It is a super-2 number, since 2×238343131² = 113614896189766322, 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 238343131.

It is not an unprimeable number, because it can be changed into a prime (238343137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9167031 + ... + 9167056.

It is an arithmetic number, because the mean of its divisors is an integer number (64169308).

Almost surely, 2^238343131 is an apocalyptic number.

238343131 is a deficient number, since it is larger than the sum of its proper divisors (18334101).

238343131 is a wasteful number, since it uses less digits than its factorization.

238343131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18334100.

The product of its digits is 5184, while the sum is 28.

The square root of 238343131 is about 15438.3655546823. The cubic root of 238343131 is about 620.0131206034.

Adding to 238343131 its reverse (131343832), we get a palindrome (369686963).

The spelling of 238343131 in words is "two hundred thirty-eight million, three hundred forty-three thousand, one hundred thirty-one".