67422181 has 2 divisors, whose sum is σ = 67422182. Its totient is φ = 67422180.

The previous prime is 67422161. The next prime is 67422197. The reversal of 67422181 is 18122476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55800900 + 11621281 = 7470^2 + 3409^2 .

It is a cyclic number.

It is not a de Polignac number, because 67422181 - 2¹⁷ = 67291109 is a prime.

It is a super-2 number, since 2×67422181² = 9091500981593522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67422101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33711090 + 33711091.

It is an arithmetic number, because the mean of its divisors is an integer number (33711091).

Almost surely, 2^67422181 is an apocalyptic number.

It is an amenable number.

67422181 is a deficient number, since it is larger than the sum of its proper divisors (1).

67422181 is an equidigital number, since it uses as much as digits as its factorization.

67422181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 67422181 is about 8211.1010832896. The cubic root of 67422181 is about 407.0061132362.

The spelling of 67422181 in words is "sixty-seven million, four hundred twenty-two thousand, one hundred eighty-one".