155522442 has 8 divisors (see below), whose sum is σ = 311044896. Its totient is φ = 51840812.

The previous prime is 155522431. The next prime is 155522453. The reversal of 155522442 is 244225551.

It is an interprime number because it is at equal distance from previous prime (155522431) and next prime (155522453).

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

155522442 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12960198 + ... + 12960209.

It is an arithmetic number, because the mean of its divisors is an integer number (38880612).

Almost surely, 2^155522442 is an apocalyptic number.

155522442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

155522442 is a wasteful number, since it uses less digits than its factorization.

155522442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25920412.

The product of its digits is 16000, while the sum is 30.

The square root of 155522442 is about 12470.8637230947. The cubic root of 155522442 is about 537.7713842816.

Adding to 155522442 its reverse (244225551), we get a palindrome (399747993).

The spelling of 155522442 in words is "one hundred fifty-five million, five hundred twenty-two thousand, four hundred forty-two".