228331992533 has 4 divisors (see below), whose sum is σ = 228334434828. Its totient is φ = 228329550240.

The previous prime is 228331992461. The next prime is 228331992563. The reversal of 228331992533 is 335299133822.

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 7339862929 + 220992129604 = 85673^2 + 470098^2 .

It is a cyclic number.

It is not a de Polignac number, because 228331992533 - 2¹⁶ = 228331926997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228331992563) 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, 1075088 + ... + 1269833.

It is an arithmetic number, because the mean of its divisors is an integer number (57083608707).

Almost surely, 2^228331992533 is an apocalyptic number.

It is an amenable number.

228331992533 is a deficient number, since it is larger than the sum of its proper divisors (2442295).

228331992533 is an equidigital number, since it uses as much as digits as its factorization.

228331992533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442294.

The product of its digits is 2099520, while the sum is 50.

The spelling of 228331992533 in words is "two hundred twenty-eight billion, three hundred thirty-one million, nine hundred ninety-two thousand, five hundred thirty-three".