155030442 has 96 divisors (see below), whose sum is σ = 384362496. Its totient is φ = 40756320.

The previous prime is 155030431. The next prime is 155030501. The reversal of 155030442 is 244030551.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 928243 + ... + 928409.

It is an arithmetic number, because the mean of its divisors is an integer number (4003776).

Almost surely, 2^155030442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155030442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192181248).

155030442 is an abundant number, since it is smaller than the sum of its proper divisors (229332054).

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

155030442 is a wasteful number, since it uses less digits than its factorization.

155030442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155030442 is about 12451.1221181065. The cubic root of 155030442 is about 537.2036998259.

Adding to 155030442 its reverse (244030551), we get a palindrome (399060993).

The spelling of 155030442 in words is "one hundred fifty-five million, thirty thousand, four hundred forty-two".