223045045521 has 4 divisors (see below), whose sum is σ = 297393394032. Its totient is φ = 148696697012.

The previous prime is 223045045519. The next prime is 223045045547. The reversal of 223045045521 is 125540540322.

It is a happy number.

223045045521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 223045045521 - 2¹ = 223045045519 is a prime.

It is a super-2 number, since 2×223045045521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (223045445521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37174174251 + ... + 37174174256.

It is an arithmetic number, because the mean of its divisors is an integer number (74348348508).

Almost surely, 2^223045045521 is an apocalyptic number.

It is an amenable number.

223045045521 is a deficient number, since it is larger than the sum of its proper divisors (74348348511).

223045045521 is an equidigital number, since it uses as much as digits as its factorization.

223045045521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74348348510.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 223045045521 its reverse (125540540322), we get a palindrome (348585585843).

The spelling of 223045045521 in words is "two hundred twenty-three billion, forty-five million, forty-five thousand, five hundred twenty-one".