228971323491 has 32 divisors (see below), whose sum is σ = 332763590400. Its totient is φ = 139492886400.

The previous prime is 228971323481. The next prime is 228971323523. The reversal of 228971323491 is 194323179822.

It is not a de Polignac number, because 228971323491 - 2¹¹ = 228971321443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228971323481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1671405 + ... + 1803201.

It is an arithmetic number, because the mean of its divisors is an integer number (10398862200).

Almost surely, 2^228971323491 is an apocalyptic number.

228971323491 is a deficient number, since it is larger than the sum of its proper divisors (103792266909).

228971323491 is a wasteful number, since it uses less digits than its factorization.

228971323491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132899.

The product of its digits is 1306368, while the sum is 51.

The spelling of 228971323491 in words is "two hundred twenty-eight billion, nine hundred seventy-one million, three hundred twenty-three thousand, four hundred ninety-one".