238553213 has 4 divisors (see below), whose sum is σ = 240915228. Its totient is φ = 236191200.

The previous prime is 238553191. The next prime is 238553221. The reversal of 238553213 is 312355832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131285764 + 107267449 = 11458^2 + 10357^2 .

It is a cyclic number.

It is not a de Polignac number, because 238553213 - 2⁸ = 238552957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238553213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238553713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180856 + ... + 1181057.

It is an arithmetic number, because the mean of its divisors is an integer number (60228807).

Almost surely, 2^238553213 is an apocalyptic number.

It is an amenable number.

238553213 is a deficient number, since it is larger than the sum of its proper divisors (2362015).

238553213 is a wasteful number, since it uses less digits than its factorization.

238553213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362014.

The product of its digits is 21600, while the sum is 32.

The square root of 238553213 is about 15445.1679498800. The cubic root of 238553213 is about 620.1952324812.

The spelling of 238553213 in words is "two hundred thirty-eight million, five hundred fifty-three thousand, two hundred thirteen".