238555217 has 2 divisors, whose sum is σ = 238555218. Its totient is φ = 238555216.

The previous prime is 238555211. The next prime is 238555259. The reversal of 238555217 is 712555832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188485441 + 50069776 = 13729^2 + 7076^2 .

It is a cyclic number.

It is not a de Polignac number, because 238555217 - 2¹⁰ = 238554193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238555211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119277608 + 119277609.

It is an arithmetic number, because the mean of its divisors is an integer number (119277609).

Almost surely, 2^238555217 is an apocalyptic number.

It is an amenable number.

238555217 is a deficient number, since it is larger than the sum of its proper divisors (1).

238555217 is an equidigital number, since it uses as much as digits as its factorization.

238555217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 238555217 is about 15445.2328244025. The cubic root of 238555217 is about 620.1969691556.

The spelling of 238555217 in words is "two hundred thirty-eight million, five hundred fifty-five thousand, two hundred seventeen".