228511211005 has 32 divisors (see below), whose sum is σ = 344702009088. Its totient is φ = 142448518080.

The previous prime is 228511210933. The next prime is 228511211009. The reversal of 228511211005 is 500112115822.

It is a happy number.

It is not a de Polignac number, because 228511211005 - 2⁹ = 228511210493 is a prime.

It is a super-2 number, since 2×228511211005² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228511211009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2406042 + ... + 2499211.

It is an arithmetic number, because the mean of its divisors is an integer number (10771937784).

Almost surely, 2^228511211005 is an apocalyptic number.

It is an amenable number.

228511211005 is a deficient number, since it is larger than the sum of its proper divisors (116190798083).

228511211005 is an equidigital number, since it uses as much as digits as its factorization.

228511211005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4905298 (or 4905276 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 228511211005 its reverse (500112115822), we get a palindrome (728623326827).

The spelling of 228511211005 in words is "two hundred twenty-eight billion, five hundred eleven million, two hundred eleven thousand, five".