181142282 has 4 divisors (see below), whose sum is σ = 271713426. Its totient is φ = 90571140.

The previous prime is 181142281. The next prime is 181142317. The reversal of 181142282 is 282241181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 171845881 + 9296401 = 13109^2 + 3049^2 .

It is not an unprimeable number, because it can be changed into a prime (181142281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45285569 + ... + 45285572.

Almost surely, 2^181142282 is an apocalyptic number.

181142282 is a deficient number, since it is larger than the sum of its proper divisors (90571144).

181142282 is an equidigital number, since it uses as much as digits as its factorization.

181142282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90571143.

The product of its digits is 2048, while the sum is 29.

The square root of 181142282 is about 13458.9108771847. The cubic root of 181142282 is about 565.8134647329.

The spelling of 181142282 in words is "one hundred eighty-one million, one hundred forty-two thousand, two hundred eighty-two".