223220221031 has 4 divisors (see below), whose sum is σ = 226278032352. Its totient is φ = 220162409712.

The previous prime is 223220221009. The next prime is 223220221057. The reversal of 223220221031 is 130122022322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130122022322 = 2 ⋅65061011161.

It is a cyclic number.

It is not a de Polignac number, because 223220221031 - 2⁶ = 223220220967 is a prime.

It is a super-3 number, since 3×223220221031³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223220220994 and 223220221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223220227031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1528905551 + ... + 1528905696.

It is an arithmetic number, because the mean of its divisors is an integer number (56569508088).

Almost surely, 2^223220221031 is an apocalyptic number.

223220221031 is a deficient number, since it is larger than the sum of its proper divisors (3057811321).

223220221031 is an equidigital number, since it uses as much as digits as its factorization.

223220221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057811320.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 223220221031 its reverse (130122022322), we get a palindrome (353342243353).

The spelling of 223220221031 in words is "two hundred twenty-three billion, two hundred twenty million, two hundred twenty-one thousand, thirty-one".