242864551 has 4 divisors (see below), whose sum is σ = 243444600. Its totient is φ = 242284504.

The previous prime is 242864543. The next prime is 242864599. The reversal of 242864551 is 155468242.

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

It is a cyclic number.

It is not a de Polignac number, because 242864551 - 2³ = 242864543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242864551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242864051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289396 + ... + 290233.

It is an arithmetic number, because the mean of its divisors is an integer number (60861150).

Almost surely, 2^242864551 is an apocalyptic number.

242864551 is a deficient number, since it is larger than the sum of its proper divisors (580049).

242864551 is an equidigital number, since it uses as much as digits as its factorization.

242864551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580048.

The product of its digits is 76800, while the sum is 37.

The square root of 242864551 is about 15584.1121338368. The cubic root of 242864551 is about 623.9091808092.

The spelling of 242864551 in words is "two hundred forty-two million, eight hundred sixty-four thousand, five hundred fifty-one".