238825521 has 12 divisors (see below), whose sum is σ = 376331280. Its totient is φ = 144742680.

The previous prime is 238825513. The next prime is 238825529. The reversal of 238825521 is 125528832.

238825521 is a `hidden beast` number, since 2 + 388 + 255 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (238825513) and next prime (238825529).

It is not a de Polignac number, because 238825521 - 2³ = 238825513 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (238825529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1206091 + ... + 1206288.

It is an arithmetic number, because the mean of its divisors is an integer number (31360940).

Almost surely, 2^238825521 is an apocalyptic number.

It is an amenable number.

238825521 is a deficient number, since it is larger than the sum of its proper divisors (137505759).

238825521 is a wasteful number, since it uses less digits than its factorization.

238825521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412396 (or 2412393 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 238825521 is about 15453.9807493086. The cubic root of 238825521 is about 620.4311266054.

It can be divided in two parts, 23882 and 5521, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 238825521 in words is "two hundred thirty-eight million, eight hundred twenty-five thousand, five hundred twenty-one".