238381213 has 4 divisors (see below), whose sum is σ = 272435680. Its totient is φ = 204326748.

The previous prime is 238381211. The next prime is 238381237. The reversal of 238381213 is 312183832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238381213 - 2¹ = 238381211 is a prime.

It is a super-2 number, since 2×238381213² = 113651205422702738, 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 (238381211) 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, 17027223 + ... + 17027236.

It is an arithmetic number, because the mean of its divisors is an integer number (68108920).

Almost surely, 2^238381213 is an apocalyptic number.

It is an amenable number.

238381213 is a deficient number, since it is larger than the sum of its proper divisors (34054467).

238381213 is an equidigital number, since it uses as much as digits as its factorization.

238381213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34054466.

The product of its digits is 6912, while the sum is 31.

The square root of 238381213 is about 15439.5988613694. The cubic root of 238381213 is about 620.0461403400.

The spelling of 238381213 in words is "two hundred thirty-eight million, three hundred eighty-one thousand, two hundred thirteen".