238825511 has 2 divisors, whose sum is σ = 238825512. Its totient is φ = 238825510.

The previous prime is 238825507. The next prime is 238825513. The reversal of 238825511 is 115528832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238825511 - 2² = 238825507 is a prime.

It is a super-2 number, since 2×238825511² = 114075249408822242, which contains 22 as substring.

Together with 238825513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238825513) 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, 119412755 + 119412756.

It is an arithmetic number, because the mean of its divisors is an integer number (119412756).

Almost surely, 2^238825511 is an apocalyptic number.

238825511 is the 8261-st centered heptagonal number.

238825511 is a deficient number, since it is larger than the sum of its proper divisors (1).

238825511 is an equidigital number, since it uses as much as digits as its factorization.

238825511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 35.

The square root of 238825511 is about 15453.9804257673. The cubic root of 238825511 is about 620.4311179460.

The spelling of 238825511 in words is "two hundred thirty-eight million, eight hundred twenty-five thousand, five hundred eleven".