243154552551 has 8 divisors (see below), whose sum is σ = 341269547520. Its totient is φ = 153571296312.

The previous prime is 243154552493. The next prime is 243154552573. The reversal of 243154552551 is 155255451342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243154552551 - 2¹⁰ = 243154551527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243154552651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2132934615 + ... + 2132934728.

It is an arithmetic number, because the mean of its divisors is an integer number (42658693440).

Almost surely, 2^243154552551 is an apocalyptic number.

243154552551 is a deficient number, since it is larger than the sum of its proper divisors (98114994969).

243154552551 is a wasteful number, since it uses less digits than its factorization.

243154552551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265869365.

The product of its digits is 600000, while the sum is 42.

The spelling of 243154552551 in words is "two hundred forty-three billion, one hundred fifty-four million, five hundred fifty-two thousand, five hundred fifty-one".