238023131 has 4 divisors (see below), whose sum is σ = 238573272. Its totient is φ = 237472992.

The previous prime is 238023119. The next prime is 238023133. The reversal of 238023131 is 131320832.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238023131 is a prime.

It is a super-2 number, since 2×238023131² = 113310021782086322, 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 = 238023097 and 238023106.

It is not an unprimeable number, because it can be changed into a prime (238023133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274421 + ... + 275286.

It is an arithmetic number, because the mean of its divisors is an integer number (59643318).

Almost surely, 2^238023131 is an apocalyptic number.

238023131 is a deficient number, since it is larger than the sum of its proper divisors (550141).

238023131 is an equidigital number, since it uses as much as digits as its factorization.

238023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550140.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 238023131 is about 15427.9982823437. The cubic root of 238023131 is about 619.7355193474.

Adding to 238023131 its reverse (131320832), we get a palindrome (369343963).

The spelling of 238023131 in words is "two hundred thirty-eight million, twenty-three thousand, one hundred thirty-one".