243154523439 has 12 divisors (see below), whose sum is σ = 351238713696. Its totient is φ = 162095855712.

The previous prime is 243154523411. The next prime is 243154523473. The reversal of 243154523439 is 934325451342.

243154523439 is a `hidden beast` number, since 2 + 4 + 31 + 54 + 523 + 43 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-243154523439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243154523394 and 243154523403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243154503439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377334 + ... + 792899.

It is an arithmetic number, because the mean of its divisors is an integer number (29269892808).

Almost surely, 2^243154523439 is an apocalyptic number.

243154523439 is a deficient number, since it is larger than the sum of its proper divisors (108084190257).

243154523439 is a wasteful number, since it uses less digits than its factorization.

243154523439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193326 (or 1193323 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 45.

The spelling of 243154523439 in words is "two hundred forty-three billion, one hundred fifty-four million, five hundred twenty-three thousand, four hundred thirty-nine".