243723331272 has 32 divisors (see below), whose sum is σ = 609333832800. Its totient is φ = 81237709824.

The previous prime is 243723331249. The next prime is 243723331277. The reversal of 243723331272 is 272133327342.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 243723331272.

It is not an unprimeable number, because it can be changed into a prime (243723331277) 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, 409983 + ... + 809649.

It is an arithmetic number, because the mean of its divisors is an integer number (19041682275).

Almost surely, 2^243723331272 is an apocalyptic number.

It is an amenable number.

243723331272 is an abundant number, since it is smaller than the sum of its proper divisors (365610501528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243723331272 is a wasteful number, since it uses less digits than its factorization.

243723331272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425085 (or 425081 counting only the distinct ones).

The product of its digits is 254016, while the sum is 39.

The spelling of 243723331272 in words is "two hundred forty-three billion, seven hundred twenty-three million, three hundred thirty-one thousand, two hundred seventy-two".