242550661 has 4 divisors (see below), whose sum is σ = 242609472. Its totient is φ = 242491852.

The previous prime is 242550647. The next prime is 242550719. The reversal of 242550661 is 166055242.

242550661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166055242 = 2 ⋅83027621.

It is a cyclic number.

It is not a de Polignac number, because 242550661 - 2⁷ = 242550533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242550601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22711 + ... + 31636.

It is an arithmetic number, because the mean of its divisors is an integer number (60652368).

Almost surely, 2^242550661 is an apocalyptic number.

It is an amenable number.

242550661 is a deficient number, since it is larger than the sum of its proper divisors (58811).

242550661 is an equidigital number, since it uses as much as digits as its factorization.

242550661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58810.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 242550661 is about 15574.0380441297. The cubic root of 242550661 is about 623.6402747006.

The spelling of 242550661 in words is "two hundred forty-two million, five hundred fifty thousand, six hundred sixty-one".