142231181 has 2 divisors, whose sum is σ = 142231182. Its totient is φ = 142231180.

The previous prime is 142231121. The next prime is 142231249. The reversal of 142231181 is 181132241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 56761156 = 9245^2 + 7534^2 .

It is a cyclic number.

It is not a de Polignac number, because 142231181 - 2¹⁴ = 142214797 is a prime.

It is a super-2 number, since 2×142231181² = 40459417697309522, 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 (142231121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71115590 + 71115591.

It is an arithmetic number, because the mean of its divisors is an integer number (71115591).

Almost surely, 2^142231181 is an apocalyptic number.

It is an amenable number.

142231181 is a deficient number, since it is larger than the sum of its proper divisors (1).

142231181 is an equidigital number, since it uses as much as digits as its factorization.

142231181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

The square root of 142231181 is about 11926.0714822610. The cubic root of 142231181 is about 521.9933120599.

The spelling of 142231181 in words is "one hundred forty-two million, two hundred thirty-one thousand, one hundred eighty-one".