181128106 has 4 divisors (see below), whose sum is σ = 271692162. Its totient is φ = 90564052.

The previous prime is 181128089. The next prime is 181128107. The reversal of 181128106 is 601821181.

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., 114297481 + 66830625 = 10691^2 + 8175^2 .

It is not an unprimeable number, because it can be changed into a prime (181128107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45282025 + ... + 45282028.

Almost surely, 2^181128106 is an apocalyptic number.

181128106 is a deficient number, since it is larger than the sum of its proper divisors (90564056).

181128106 is an equidigital number, since it uses as much as digits as its factorization.

181128106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90564055.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 181128106 is about 13458.3842269420. The cubic root of 181128106 is about 565.7987043636.

Adding to 181128106 its reverse (601821181), we get a palindrome (782949287).

The spelling of 181128106 in words is "one hundred eighty-one million, one hundred twenty-eight thousand, one hundred six".