243551313315 has 12 divisors (see below), whose sum is σ = 422155609824. Its totient is φ = 129894033744.

The previous prime is 243551313311. The next prime is 243551313329. The reversal of 243551313315 is 513313155342.

243551313315 is a `hidden beast` number, since 2 + 4 + 3 + 5 + 513 + 133 + 1 + 5 = 666.

243551313315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243551313315 - 2² = 243551313311 is a prime.

It is a super-2 number, since 2×243551313315² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243551313315.

It is not an unprimeable number, because it can be changed into a prime (243551313311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2706125659 + ... + 2706125748.

It is an arithmetic number, because the mean of its divisors is an integer number (35179634152).

Almost surely, 2^243551313315 is an apocalyptic number.

243551313315 is a deficient number, since it is larger than the sum of its proper divisors (178604296509).

243551313315 is a wasteful number, since it uses less digits than its factorization.

243551313315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5412251418 (or 5412251415 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

Adding to 243551313315 its reverse (513313155342), we get a palindrome (756864468657).

The spelling of 243551313315 in words is "two hundred forty-three billion, five hundred fifty-one million, three hundred thirteen thousand, three hundred fifteen".