243034513551 has 12 divisors (see below), whose sum is σ = 351658265712. Its totient is φ = 161742203136.

The previous prime is 243034513531. The next prime is 243034513607. The reversal of 243034513551 is 155315430342.

243034513551 is a `hidden beast` number, since 2 + 430 + 3 + 45 + 135 + 51 = 666.

It is not a de Polignac number, because 243034513551 - 2³³ = 234444578959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243034513531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23395011 + ... + 23405396.

It is an arithmetic number, because the mean of its divisors is an integer number (29304855476).

Almost surely, 2^243034513551 is an apocalyptic number.

243034513551 is a deficient number, since it is larger than the sum of its proper divisors (108623752161).

243034513551 is a wasteful number, since it uses less digits than its factorization.

243034513551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46800990 (or 46800987 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 243034513551 its reverse (155315430342), we get a palindrome (398349943893).

The spelling of 243034513551 in words is "two hundred forty-three billion, thirty-four million, five hundred thirteen thousand, five hundred fifty-one".