243412551 has 12 divisors (see below), whose sum is σ = 359773128. Its totient is φ = 158500944.

The previous prime is 243412469. The next prime is 243412607. The reversal of 243412551 is 155214342.

243412551 is a `hidden beast` number, since 243 + 412 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 243412551 - 2⁷ = 243412423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243410551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314100 + ... + 314873.

It is an arithmetic number, because the mean of its divisors is an integer number (29981094).

Almost surely, 2^243412551 is an apocalyptic number.

243412551 is a deficient number, since it is larger than the sum of its proper divisors (116360577).

243412551 is a wasteful number, since it uses less digits than its factorization.

243412551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629022 (or 629019 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 243412551 is about 15601.6842360048. The cubic root of 243412551 is about 624.3780915598.

Adding to 243412551 its reverse (155214342), we get a palindrome (398626893).

The spelling of 243412551 in words is "two hundred forty-three million, four hundred twelve thousand, five hundred fifty-one".