223123551220 has 48 divisors (see below), whose sum is σ = 472086912528. Its totient is φ = 88577822720.

The previous prime is 223123551173. The next prime is 223123551227. The reversal of 223123551220 is 22155321322.

It can be written as a sum of positive squares in 8 ways, for example, as 60364558864 + 162758992356 = 245692^2 + 403434^2 .

It is a super-3 number, since 3×223123551220³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223123551227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19703160 + ... + 19714480.

It is an arithmetic number, because the mean of its divisors is an integer number (9835144011).

Almost surely, 2^223123551220 is an apocalyptic number.

223123551220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223123551220 is an abundant number, since it is smaller than the sum of its proper divisors (248963361308).

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

223123551220 is a wasteful number, since it uses less digits than its factorization.

223123551220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18660 (or 18658 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 223123551220 its reverse (22155321322), we get a palindrome (245278872542).

The spelling of 223123551220 in words is "two hundred twenty-three billion, one hundred twenty-three million, five hundred fifty-one thousand, two hundred twenty".