242451805 has 4 divisors (see below), whose sum is σ = 290942172. Its totient is φ = 193961440.

The previous prime is 242451793. The next prime is 242451821. The reversal of 242451805 is 508154242.

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 184036356 + 58415449 = 13566^2 + 7643^2 .

It is not a de Polignac number, because 242451805 - 2²⁵ = 208897373 is a prime.

It is a Duffinian number.

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, 24245176 + ... + 24245185.

It is an arithmetic number, because the mean of its divisors is an integer number (72735543).

Almost surely, 2^242451805 is an apocalyptic number.

It is an amenable number.

242451805 is a deficient number, since it is larger than the sum of its proper divisors (48490367).

242451805 is an equidigital number, since it uses as much as digits as its factorization.

242451805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48490366.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 242451805 is about 15570.8639773135. The cubic root of 242451805 is about 623.5555378182. Note that the first 4 decimals are identical.

The spelling of 242451805 in words is "two hundred forty-two million, four hundred fifty-one thousand, eight hundred five".