238021565 has 16 divisors (see below), whose sum is σ = 296679936. Its totient is φ = 183124800.

The previous prime is 238021561. The next prime is 238021591. The reversal of 238021565 is 565120832.

It is not a de Polignac number, because 238021565 - 2² = 238021561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238021561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20555 + ... + 29975.

It is an arithmetic number, because the mean of its divisors is an integer number (18542496).

Almost surely, 2^238021565 is an apocalyptic number.

It is an amenable number.

238021565 is a deficient number, since it is larger than the sum of its proper divisors (58658371).

238021565 is a wasteful number, since it uses less digits than its factorization.

238021565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 238021565 is about 15427.9475303749. The cubic root of 238021565 is about 619.7341602247.

The spelling of 238021565 in words is "two hundred thirty-eight million, twenty-one thousand, five hundred sixty-five".