155530242 has 24 divisors (see below), whose sum is σ = 385122816. Its totient is φ = 44437176.

The previous prime is 155530231. The next prime is 155530253. The reversal of 155530242 is 242035551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155530231) and next prime (155530253).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617058 + ... + 617309.

It is an arithmetic number, because the mean of its divisors is an integer number (16046784).

Almost surely, 2^155530242 is an apocalyptic number.

155530242 is an abundant number, since it is smaller than the sum of its proper divisors (229592574).

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

155530242 is a wasteful number, since it uses less digits than its factorization.

155530242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234382 (or 1234379 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 155530242 is about 12471.1764481143. The cubic root of 155530242 is about 537.7803745097.

Adding to 155530242 its reverse (242035551), we get a palindrome (397565793).

The spelling of 155530242 in words is "one hundred fifty-five million, five hundred thirty thousand, two hundred forty-two".