223445140 has 12 divisors (see below), whose sum is σ = 469234836. Its totient is φ = 89378048.

The previous prime is 223445113. The next prime is 223445143. The reversal of 223445140 is 41544322.

It is a happy number.

223445140 is digitally balanced in base 3, 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 60933636 + 162511504 = 7806^2 + 12748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223445143) 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, 5586109 + ... + 5586148.

It is an arithmetic number, because the mean of its divisors is an integer number (39102903).

Almost surely, 2^223445140 is an apocalyptic number.

223445140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223445140 is an abundant number, since it is smaller than the sum of its proper divisors (245789696).

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

223445140 is a wasteful number, since it uses less digits than its factorization.

223445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172266 (or 11172264 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 223445140 is about 14948.0814822505. The cubic root of 223445140 is about 606.8159268587.

Adding to 223445140 its reverse (41544322), we get a palindrome (264989462).

It can be divided in two parts, 2234 and 45140, that added together give a palindrome (47374).

The spelling of 223445140 in words is "two hundred twenty-three million, four hundred forty-five thousand, one hundred forty".