223138550 has 12 divisors (see below), whose sum is σ = 415037796. Its totient is φ = 89255400.

The previous prime is 223138547. The next prime is 223138577. The reversal of 223138550 is 55831322.

It is a super-3 number, since 3×223138550³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2231336 + ... + 2231435.

It is an arithmetic number, because the mean of its divisors is an integer number (34586483).

Almost surely, 2^223138550 is an apocalyptic number.

223138550 is a deficient number, since it is larger than the sum of its proper divisors (191899246).

223138550 is a wasteful number, since it uses less digits than its factorization.

223138550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462783 (or 4462778 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 223138550 is about 14937.8227998594. The cubic root of 223138550 is about 606.5382616110.

Adding to 223138550 its reverse (55831322), we get a palindrome (278969872).

The spelling of 223138550 in words is "two hundred twenty-three million, one hundred thirty-eight thousand, five hundred fifty".