238955251 has 4 divisors (see below), whose sum is σ = 243005400. Its totient is φ = 234905104.

The previous prime is 238955243. The next prime is 238955261. The reversal of 238955251 is 152559832.

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 238955251 - 2³ = 238955243 is a prime.

It is a super-2 number, since 2×238955251² = 114199223960946002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238955221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024986 + ... + 2025103.

It is an arithmetic number, because the mean of its divisors is an integer number (60751350).

Almost surely, 2^238955251 is an apocalyptic number.

238955251 is a deficient number, since it is larger than the sum of its proper divisors (4050149).

238955251 is an equidigital number, since it uses as much as digits as its factorization.

238955251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050148.

The product of its digits is 108000, while the sum is 40.

The square root of 238955251 is about 15458.1774798972. The cubic root of 238955251 is about 620.5434456467.

The spelling of 238955251 in words is "two hundred thirty-eight million, nine hundred fifty-five thousand, two hundred fifty-one".