243205512313 has 8 divisors (see below), whose sum is σ = 243341894432. Its totient is φ = 243069175296.

The previous prime is 243205512287. The next prime is 243205512349. The reversal of 243205512313 is 313215502342.

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

It is a cyclic number.

It is not a de Polignac number, because 243205512313 - 2⁵ = 243205512281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243205512373) 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, 17233006 + ... + 17247112.

It is an arithmetic number, because the mean of its divisors is an integer number (30417736804).

Almost surely, 2^243205512313 is an apocalyptic number.

It is an amenable number.

243205512313 is a deficient number, since it is larger than the sum of its proper divisors (136382119).

243205512313 is a wasteful number, since it uses less digits than its factorization.

243205512313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22551.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 243205512313 in words is "two hundred forty-three billion, two hundred five million, five hundred twelve thousand, three hundred thirteen".