238857215 has 4 divisors (see below), whose sum is σ = 286628664. Its totient is φ = 191085768.

The previous prime is 238857173. The next prime is 238857247. The reversal of 238857215 is 512758832.

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 238857215 - 2¹² = 238853119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23885717 + ... + 23885726.

It is an arithmetic number, because the mean of its divisors is an integer number (71657166).

Almost surely, 2^238857215 is an apocalyptic number.

238857215 is a deficient number, since it is larger than the sum of its proper divisors (47771449).

238857215 is an equidigital number, since it uses as much as digits as its factorization.

238857215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47771448.

The product of its digits is 134400, while the sum is 41.

The square root of 238857215 is about 15455.0061468768. The cubic root of 238857215 is about 620.4585707332.

The spelling of 238857215 in words is "two hundred thirty-eight million, eight hundred fifty-seven thousand, two hundred fifteen".