155432242 has 8 divisors (see below), whose sum is σ = 266455296. Its totient is φ = 66613812.

The previous prime is 155432239. The next prime is 155432261. The reversal of 155432242 is 242234551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 155432242.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5551138 + ... + 5551165.

It is an arithmetic number, because the mean of its divisors is an integer number (33306912).

Almost surely, 2^155432242 is an apocalyptic number.

155432242 is a deficient number, since it is larger than the sum of its proper divisors (111023054).

155432242 is a wasteful number, since it uses less digits than its factorization.

155432242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102312.

The product of its digits is 9600, while the sum is 28.

The square root of 155432242 is about 12467.2467690345. The cubic root of 155432242 is about 537.6673985182.

Adding to 155432242 its reverse (242234551), we get a palindrome (397666793).

The spelling of 155432242 in words is "one hundred fifty-five million, four hundred thirty-two thousand, two hundred forty-two".