243097715997 has 32 divisors (see below), whose sum is σ = 363735619200. Its totient is φ = 160451138304.

The previous prime is 243097715983. The next prime is 243097716007. The reversal of 243097715997 is 799517790342.

243097715997 is a `hidden beast` number, since 2 + 4 + 30 + 9 + 7 + 7 + 1 + 599 + 7 = 666.

It is not a de Polignac number, because 243097715997 - 2⁴ = 243097715981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243097715957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4796533 + ... + 4846949.

It is an arithmetic number, because the mean of its divisors is an integer number (11366738100).

Almost surely, 2^243097715997 is an apocalyptic number.

243097715997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

243097715997 is a deficient number, since it is larger than the sum of its proper divisors (120637903203).

243097715997 is a wasteful number, since it uses less digits than its factorization.

243097715997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52202 (or 52196 counting only the distinct ones).

The product of its (nonzero) digits is 30005640, while the sum is 63.

The spelling of 243097715997 in words is "two hundred forty-three billion, ninety-seven million, seven hundred fifteen thousand, nine hundred ninety-seven".