223142581 has 2 divisors, whose sum is σ = 223142582. Its totient is φ = 223142580.

The previous prime is 223142551. The next prime is 223142587. The reversal of 223142581 is 185241322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174002481 + 49140100 = 13191^2 + 7010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223142581 is a prime.

It is a super-3 number, since 3×223142581³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223142587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111571290 + 111571291.

It is an arithmetic number, because the mean of its divisors is an integer number (111571291).

Almost surely, 2^223142581 is an apocalyptic number.

It is an amenable number.

223142581 is a deficient number, since it is larger than the sum of its proper divisors (1).

223142581 is an equidigital number, since it uses as much as digits as its factorization.

223142581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 28.

The square root of 223142581 is about 14937.9577252046. The cubic root of 223142581 is about 606.5419139622.

The spelling of 223142581 in words is "two hundred twenty-three million, one hundred forty-two thousand, five hundred eighty-one".