238218431 has 8 divisors (see below), whose sum is σ = 260233344. Its totient is φ = 216263320.

The previous prime is 238218373. The next prime is 238218437. The reversal of 238218431 is 134812832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238218431 - 2¹⁰ = 238217407 is a prime.

It is a super-2 number, since 2×238218431² = 113496041736203522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238218437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6401 + ... + 22746.

It is an arithmetic number, because the mean of its divisors is an integer number (32529168).

Almost surely, 2^238218431 is an apocalyptic number.

238218431 is a deficient number, since it is larger than the sum of its proper divisors (22014913).

238218431 is a wasteful number, since it uses less digits than its factorization.

238218431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29901.

The product of its digits is 9216, while the sum is 32.

The square root of 238218431 is about 15434.3263863377. The cubic root of 238218431 is about 619.9049724286.

The spelling of 238218431 in words is "two hundred thirty-eight million, two hundred eighteen thousand, four hundred thirty-one".