243115203451 has 8 divisors (see below), whose sum is σ = 253697095584. Its totient is φ = 232534283520.

The previous prime is 243115203439. The next prime is 243115203493. The reversal of 243115203451 is 154302511342.

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

It is a de Polignac number, because none of the positive numbers 2^k-243115203451 is a prime.

It is a super-2 number, since 2×243115203451² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243115203421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293161 + ... + 756421.

It is an arithmetic number, because the mean of its divisors is an integer number (31712136948).

Almost surely, 2^243115203451 is an apocalyptic number.

243115203451 is a deficient number, since it is larger than the sum of its proper divisors (10581892133).

243115203451 is a wasteful number, since it uses less digits than its factorization.

243115203451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486101.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 243115203451 its reverse (154302511342), we get a palindrome (397417714793).

The spelling of 243115203451 in words is "two hundred forty-three billion, one hundred fifteen million, two hundred three thousand, four hundred fifty-one".