243234415391 has 4 divisors (see below), whose sum is σ = 265346634984. Its totient is φ = 221122195800.

The previous prime is 243234415381. The next prime is 243234415399. The reversal of 243234415391 is 193514432342.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 243234415391 - 2³⁰ = 242160673567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243234415399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11056109780 + ... + 11056109801.

It is an arithmetic number, because the mean of its divisors is an integer number (66336658746).

Almost surely, 2^243234415391 is an apocalyptic number.

243234415391 is a deficient number, since it is larger than the sum of its proper divisors (22112219593).

243234415391 is a wasteful number, since it uses less digits than its factorization.

243234415391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22112219592.

The product of its digits is 311040, while the sum is 41.

The spelling of 243234415391 in words is "two hundred forty-three billion, two hundred thirty-four million, four hundred fifteen thousand, three hundred ninety-one".