238585157 has 4 divisors (see below), whose sum is σ = 252619596. Its totient is φ = 224550720.

The previous prime is 238585153. The next prime is 238585159. The reversal of 238585157 is 751585832.

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

It can be written as a sum of positive squares in 2 ways, for example, as 186759556 + 51825601 = 13666^2 + 7199^2 .

It is a cyclic number.

It is not a de Polignac number, because 238585157 - 2² = 238585153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238585153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7017194 + ... + 7017227.

It is an arithmetic number, because the mean of its divisors is an integer number (63154899).

Almost surely, 2^238585157 is an apocalyptic number.

It is an amenable number.

238585157 is a deficient number, since it is larger than the sum of its proper divisors (14034439).

238585157 is a wasteful number, since it uses less digits than its factorization.

238585157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14034438.

The product of its digits is 336000, while the sum is 44.

The square root of 238585157 is about 15446.2020250934. The cubic root of 238585157 is about 620.2229141209. Note that the first 3 decimals are identical.

The spelling of 238585157 in words is "two hundred thirty-eight million, five hundred eighty-five thousand, one hundred fifty-seven".