228138619203 has 20 divisors (see below), whose sum is σ = 371781454968. Its totient is φ = 138265829280.

The previous prime is 228138619151. The next prime is 228138619211. The reversal of 228138619203 is 302916831822.

228138619203 is a `hidden beast` number, since 2 + 2 + 8 + 1 + 3 + 8 + 619 + 20 + 3 = 666.

It is not a de Polignac number, because 228138619203 - 2²⁵ = 228105064771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228138619213) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 128023026 + ... + 128024807.

Almost surely, 2^228138619203 is an apocalyptic number.

228138619203 is a deficient number, since it is larger than the sum of its proper divisors (143642835765).

228138619203 is a wasteful number, since it uses less digits than its factorization.

228138619203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256047856 (or 256047847 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 228138619203 in words is "two hundred twenty-eight billion, one hundred thirty-eight million, six hundred nineteen thousand, two hundred three".