181227642 has 16 divisors (see below), whose sum is σ = 367561152. Its totient is φ = 59558240.

The previous prime is 181227619. The next prime is 181227647. The reversal of 181227642 is 246722181.

181227642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (181227647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212283 + ... + 213134.

It is an arithmetic number, because the mean of its divisors is an integer number (22972572).

Almost surely, 2^181227642 is an apocalyptic number.

181227642 is an abundant number, since it is smaller than the sum of its proper divisors (186333510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181227642 is a wasteful number, since it uses less digits than its factorization.

181227642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425493.

The product of its digits is 10752, while the sum is 33.

The square root of 181227642 is about 13462.0816369535. The cubic root of 181227642 is about 565.9023272048.

The spelling of 181227642 in words is "one hundred eighty-one million, two hundred twenty-seven thousand, six hundred forty-two".