242155550 has 72 divisors (see below), whose sum is σ = 564323256. Its totient is φ = 76628160.

The previous prime is 242155549. The next prime is 242155559. The reversal of 242155550 is 55551242.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242155559) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 28049 + ... + 35651.

It is an arithmetic number, because the mean of its divisors is an integer number (7837823).

Almost surely, 2^242155550 is an apocalyptic number.

242155550 is an abundant number, since it is smaller than the sum of its proper divisors (322167706).

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

242155550 is a wasteful number, since it uses less digits than its factorization.

242155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7642 (or 7630 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 242155550 is about 15561.3479493262. The cubic root of 242155550 is about 623.3014574401.

The spelling of 242155550 in words is "two hundred forty-two million, one hundred fifty-five thousand, five hundred fifty".