221023155423 has 16 divisors (see below), whose sum is σ = 337059737856. Its totient is φ = 126200490240.

The previous prime is 221023155421. The next prime is 221023155427. The reversal of 221023155423 is 324551320122.

It is not a de Polignac number, because 221023155423 - 2¹ = 221023155421 is a prime.

It is a super-2 number, since 2×221023155423² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221023155421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4074738 + ... + 4128623.

It is an arithmetic number, because the mean of its divisors is an integer number (21066233616).

Almost surely, 2^221023155423 is an apocalyptic number.

221023155423 is a deficient number, since it is larger than the sum of its proper divisors (116036582433).

221023155423 is a wasteful number, since it uses less digits than its factorization.

221023155423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8204654.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 221023155423 its reverse (324551320122), we get a palindrome (545574475545).

The spelling of 221023155423 in words is "two hundred twenty-one billion, twenty-three million, one hundred fifty-five thousand, four hundred twenty-three".