243723256334 has 4 divisors (see below), whose sum is σ = 365584884504. Its totient is φ = 121861628166.

The previous prime is 243723256319. The next prime is 243723256367. The reversal of 243723256334 is 433652327342.

It is a happy number.

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

It is a super-2 number, since 2×243723256334² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60930814082 + ... + 60930814085.

It is an arithmetic number, because the mean of its divisors is an integer number (91396221126).

Almost surely, 2^243723256334 is an apocalyptic number.

243723256334 is a deficient number, since it is larger than the sum of its proper divisors (121861628170).

243723256334 is a wasteful number, since it uses less digits than its factorization.

243723256334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121861628169.

The product of its digits is 2177280, while the sum is 44.

The spelling of 243723256334 in words is "two hundred forty-three billion, seven hundred twenty-three million, two hundred fifty-six thousand, three hundred thirty-four".