243120354319 has 16 divisors (see below), whose sum is σ = 254448000000. Its totient is φ = 232063349760.

The previous prime is 243120354227. The next prime is 243120354383. The reversal of 243120354319 is 913453021342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120354319 is a prime.

It is a super-2 number, since 2×243120354319² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120351319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 723807 + ... + 1005055.

It is an arithmetic number, because the mean of its divisors is an integer number (15903000000).

Almost surely, 2^243120354319 is an apocalyptic number.

243120354319 is a deficient number, since it is larger than the sum of its proper divisors (11327645681).

243120354319 is a wasteful number, since it uses less digits than its factorization.

243120354319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281730.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 243120354319 in words is "two hundred forty-three billion, one hundred twenty million, three hundred fifty-four thousand, three hundred nineteen".