242181845 has 4 divisors (see below), whose sum is σ = 290618220. Its totient is φ = 193745472.

The previous prime is 242181839. The next prime is 242181859. The reversal of 242181845 is 548181242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103083409 + 139098436 = 10153^2 + 11794^2 .

It is a cyclic number.

It is not a de Polignac number, because 242181845 - 2¹⁸ = 241919701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24218180 + ... + 24218189.

It is an arithmetic number, because the mean of its divisors is an integer number (72654555).

Almost surely, 2^242181845 is an apocalyptic number.

It is an amenable number.

242181845 is a deficient number, since it is larger than the sum of its proper divisors (48436375).

242181845 is an equidigital number, since it uses as much as digits as its factorization.

242181845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48436374.

The product of its digits is 20480, while the sum is 35.

The square root of 242181845 is about 15562.1928082131. The cubic root of 242181845 is about 623.3240174827.

The spelling of 242181845 in words is "two hundred forty-two million, one hundred eighty-one thousand, eight hundred forty-five".