228660862561 has 4 divisors (see below), whose sum is σ = 228664193812. Its totient is φ = 228657531312.

The previous prime is 228660862543. The next prime is 228660862601. The reversal of 228660862561 is 165268066822.

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 139188686400 + 89472176161 = 373080^2 + 299119^2 .

It is a cyclic number.

It is not a de Polignac number, because 228660862561 - 2¹¹ = 228660860513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228660862499 and 228660862508.

It is not an unprimeable number, because it can be changed into a prime (228660862061) 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, 1560450 + ... + 1700683.

It is an arithmetic number, because the mean of its divisors is an integer number (57166048453).

Almost surely, 2^228660862561 is an apocalyptic number.

It is an amenable number.

228660862561 is a deficient number, since it is larger than the sum of its proper divisors (3331251).

228660862561 is an equidigital number, since it uses as much as digits as its factorization.

228660862561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331250.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 228660862561 in words is "two hundred twenty-eight billion, six hundred sixty million, eight hundred sixty-two thousand, five hundred sixty-one".