223131247 has 2 divisors, whose sum is σ = 223131248. Its totient is φ = 223131246.

The previous prime is 223131187. The next prime is 223131281. The reversal of 223131247 is 742131322.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223131247 is a prime.

It is a super-3 number, since 3×223131247³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223131287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111565623 + 111565624.

It is an arithmetic number, because the mean of its divisors is an integer number (111565624).

Almost surely, 2^223131247 is an apocalyptic number.

223131247 is a deficient number, since it is larger than the sum of its proper divisors (1).

223131247 is an equidigital number, since it uses as much as digits as its factorization.

223131247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 223131247 is about 14937.5783512589. The cubic root of 223131247 is about 606.5316445007.

Adding to 223131247 its reverse (742131322), we get a palindrome (965262569).

The spelling of 223131247 in words is "two hundred twenty-three million, one hundred thirty-one thousand, two hundred forty-seven".