238221057 has 8 divisors (see below), whose sum is σ = 317853376. Its totient is φ = 158701392.

The previous prime is 238221047. The next prime is 238221083. The reversal of 238221057 is 750122832.

238221057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 238221057 - 2¹⁶ = 238155521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238221047) 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, 23098 + ... + 31779.

It is an arithmetic number, because the mean of its divisors is an integer number (39731672).

Almost surely, 2^238221057 is an apocalyptic number.

It is an amenable number.

238221057 is a deficient number, since it is larger than the sum of its proper divisors (79632319).

238221057 is a wasteful number, since it uses less digits than its factorization.

238221057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56327.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 238221057 is about 15434.4114562234. The cubic root of 238221057 is about 619.9072502603.

Adding to 238221057 its reverse (750122832), we get a palindrome (988343889).

The spelling of 238221057 in words is "two hundred thirty-eight million, two hundred twenty-one thousand, fifty-seven".