238213643 has 4 divisors (see below), whose sum is σ = 239640240. Its totient is φ = 236787048.

The previous prime is 238213603. The next prime is 238213663. The reversal of 238213643 is 346312832.

238213643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 238213643 - 2⁸ = 238213387 is a prime.

It is a super-2 number, since 2×238213643² = 113491479422662898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238213603) 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, 713048 + ... + 713381.

It is an arithmetic number, because the mean of its divisors is an integer number (59910060).

Almost surely, 2^238213643 is an apocalyptic number.

238213643 is a deficient number, since it is larger than the sum of its proper divisors (1426597).

238213643 is a wasteful number, since it uses less digits than its factorization.

238213643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426596.

The product of its digits is 20736, while the sum is 32.

The square root of 238213643 is about 15434.1712767482. The cubic root of 238213643 is about 619.9008192026.

The spelling of 238213643 in words is "two hundred thirty-eight million, two hundred thirteen thousand, six hundred forty-three".