223212131 has 8 divisors (see below), whose sum is σ = 225216000. Its totient is φ = 221217480.

The previous prime is 223212127. The next prime is 223212139. The reversal of 223212131 is 131212322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223212131 - 2² = 223212127 is a prime.

It is a super-3 number, since 3×223212131³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223212139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51860 + ... + 55998.

It is an arithmetic number, because the mean of its divisors is an integer number (28152000).

Almost surely, 2^223212131 is an apocalyptic number.

223212131 is a deficient number, since it is larger than the sum of its proper divisors (2003869).

223212131 is a wasteful number, since it uses less digits than its factorization.

223212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609.

The product of its digits is 144, while the sum is 17.

The square root of 223212131 is about 14940.2855059734. The cubic root of 223212131 is about 606.6049239114.

Adding to 223212131 its reverse (131212322), we get a palindrome (354424453).

The spelling of 223212131 in words is "two hundred twenty-three million, two hundred twelve thousand, one hundred thirty-one".