228511211004 has 36 divisors (see below), whose sum is σ = 578281289040. Its totient is φ = 76083934080.

The previous prime is 228511210933. The next prime is 228511211009. The reversal of 228511211004 is 400112115822.

228511211004 is a `hidden beast` number, since 2 + 28 + 511 + 21 + 100 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×228511211004² (a number of 24 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 3570744 + ... + 3634175.

It is an arithmetic number, because the mean of its divisors is an integer number (16063369140).

Almost surely, 2^228511211004 is an apocalyptic number.

It is an amenable number.

228511211004 is an abundant number, since it is smaller than the sum of its proper divisors (349770078036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228511211004 is a wasteful number, since it uses less digits than its factorization.

228511211004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205810 (or 7205805 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

Adding to 228511211004 its reverse (400112115822), we get a palindrome (628623326826).

The spelling of 228511211004 in words is "two hundred twenty-eight billion, five hundred eleven million, two hundred eleven thousand, four".