238903155 has 32 divisors (see below), whose sum is σ = 425502720. Its totient is φ = 127179360.

The previous prime is 238903153. The next prime is 238903157. The reversal of 238903155 is 551309832.

It is an interprime number because it is at equal distance from previous prime (238903153) and next prime (238903157).

It is not a de Polignac number, because 238903155 - 2¹ = 238903153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238903153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90910 + ... + 93500.

It is an arithmetic number, because the mean of its divisors is an integer number (13296960).

Almost surely, 2^238903155 is an apocalyptic number.

238903155 is a deficient number, since it is larger than the sum of its proper divisors (186599565).

238903155 is a wasteful number, since it uses less digits than its factorization.

238903155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288 (or 3282 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 238903155 is about 15456.4923252334. The cubic root of 238903155 is about 620.4983462947.

The spelling of 238903155 in words is "two hundred thirty-eight million, nine hundred three thousand, one hundred fifty-five".