228321137385 has 24 divisors (see below), whose sum is σ = 431734515264. Its totient is φ = 110701157280.

The previous prime is 228321137383. The next prime is 228321137393. The reversal of 228321137385 is 583731123822.

228321137385 is a `hidden beast` number, since 2 + 28 + 3 + 211 + 37 + 385 = 666.

It is not a de Polignac number, because 228321137385 - 2¹ = 228321137383 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 228321137385.

It is not an unprimeable number, because it can be changed into a prime (228321137381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230626917 + ... + 230627906.

It is an arithmetic number, because the mean of its divisors is an integer number (17988938136).

Almost surely, 2^228321137385 is an apocalyptic number.

It is an amenable number.

228321137385 is a deficient number, since it is larger than the sum of its proper divisors (203413377879).

228321137385 is a wasteful number, since it uses less digits than its factorization.

228321137385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461254845 (or 461254842 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 228321137385 in words is "two hundred twenty-eight billion, three hundred twenty-one million, one hundred thirty-seven thousand, three hundred eighty-five".