228231752393 has 4 divisors (see below), whose sum is σ = 228266715540. Its totient is φ = 228196789248.

The previous prime is 228231752389. The next prime is 228231752429. The reversal of 228231752393 is 393257132822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8498627344 + 219733125049 = 92188^2 + 468757^2 .

It is a cyclic number.

It is not a de Polignac number, because 228231752393 - 2² = 228231752389 is a prime.

It is a super-2 number, since 2×228231752393² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228231752363) 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, 17471780 + ... + 17484837.

It is an arithmetic number, because the mean of its divisors is an integer number (57066678885).

Almost surely, 2^228231752393 is an apocalyptic number.

It is an amenable number.

228231752393 is a deficient number, since it is larger than the sum of its proper divisors (34963147).

228231752393 is an equidigital number, since it uses as much as digits as its factorization.

228231752393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34963146.

The product of its digits is 1088640, while the sum is 47.

The spelling of 228231752393 in words is "two hundred twenty-eight billion, two hundred thirty-one million, seven hundred fifty-two thousand, three hundred ninety-three".