242543805 has 32 divisors (see below), whose sum is σ = 446363904. Its totient is φ = 110163456.

The previous prime is 242543803. The next prime is 242543813. The reversal of 242543805 is 508345242.

It is not a de Polignac number, because 242543805 - 2¹ = 242543803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242543803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9129 + ... + 23841.

It is an arithmetic number, because the mean of its divisors is an integer number (13948872).

Almost surely, 2^242543805 is an apocalyptic number.

It is an amenable number.

242543805 is a deficient number, since it is larger than the sum of its proper divisors (203820099).

242543805 is a wasteful number, since it uses less digits than its factorization.

242543805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14885.

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 242543805 is about 15573.8179326715. The cubic root of 242543805 is about 623.6343986526.

The spelling of 242543805 in words is "two hundred forty-two million, five hundred forty-three thousand, eight hundred five".