155575242 has 20 divisors (see below), whose sum is σ = 348604146. Its totient is φ = 51858360.

The previous prime is 155575237. The next prime is 155575261. The reversal of 155575242 is 242575551.

155575242 is a `hidden beast` number, since 15 + 557 + 52 + 42 = 666.

155575242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 147841281 + 7733961 = 12159^2 + 2781^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155575197 and 155575206.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 480009 + ... + 480332.

Almost surely, 2^155575242 is an apocalyptic number.

155575242 is an abundant number, since it is smaller than the sum of its proper divisors (193028904).

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

155575242 is an equidigital number, since it uses as much as digits as its factorization.

155575242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960355 (or 960346 counting only the distinct ones).

The product of its digits is 70000, while the sum is 36.

The square root of 155575242 is about 12472.9804778168. The cubic root of 155575242 is about 537.8322353417.

The spelling of 155575242 in words is "one hundred fifty-five million, five hundred seventy-five thousand, two hundred forty-two".