238132231 has 2 divisors, whose sum is σ = 238132232. Its totient is φ = 238132230.

The previous prime is 238132211. The next prime is 238132261. The reversal of 238132231 is 132231832.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238132231 is a prime.

It is a super-2 number, since 2×238132231² = 113413918882074722, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 238132196 and 238132205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238132211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119066115 + 119066116.

It is an arithmetic number, because the mean of its divisors is an integer number (119066116).

Almost surely, 2^238132231 is an apocalyptic number.

238132231 is a deficient number, since it is larger than the sum of its proper divisors (1).

238132231 is an equidigital number, since it uses as much as digits as its factorization.

238132231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 238132231 is about 15431.5336567692. The cubic root of 238132231 is about 619.8301919634.

The spelling of 238132231 in words is "two hundred thirty-eight million, one hundred thirty-two thousand, two hundred thirty-one".