67131223 has 2 divisors, whose sum is σ = 67131224. Its totient is φ = 67131222.

The previous prime is 67131193. The next prime is 67131263. The reversal of 67131223 is 32213176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67131223 - 2⁵ = 67131191 is a prime.

It is a super-2 number, since 2×67131223² = 9013202202951458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67131263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33565611 + 33565612.

It is an arithmetic number, because the mean of its divisors is an integer number (33565612).

Almost surely, 2^67131223 is an apocalyptic number.

67131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

67131223 is an equidigital number, since it uses as much as digits as its factorization.

67131223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 67131223 is about 8193.3645714078. The cubic root of 67131223 is about 406.4197955946.

Adding to 67131223 its reverse (32213176), we get a palindrome (99344399).

The spelling of 67131223 in words is "sixty-seven million, one hundred thirty-one thousand, two hundred twenty-three".