723223066221 has 12 divisors (see below), whose sum is σ = 1070134944060. Its totient is φ = 470388985920.

The previous prime is 723223066217. The next prime is 723223066231. The reversal of 723223066221 is 122660322327.

723223066221 is a `hidden beast` number, since 7 + 2 + 3 + 2 + 23 + 0 + 6 + 622 + 1 = 666.

723223066221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 162800145225 + 560422920996 = 403485^2 + 748614^2 .

It is not a de Polignac number, because 723223066221 - 2² = 723223066217 is a prime.

It is a super-3 number, since 3×723223066221³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723223066231) 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, 979976686 + ... + 979977423.

It is an arithmetic number, because the mean of its divisors is an integer number (89177912005).

Almost surely, 2^723223066221 is an apocalyptic number.

It is an amenable number.

723223066221 is a deficient number, since it is larger than the sum of its proper divisors (346911877839).

723223066221 is a wasteful number, since it uses less digits than its factorization.

723223066221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959954156 (or 1959954153 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

Adding to 723223066221 its reverse (122660322327), we get a palindrome (845883388548).

The spelling of 723223066221 in words is "seven hundred twenty-three billion, two hundred twenty-three million, sixty-six thousand, two hundred twenty-one".