243772065 has 48 divisors (see below), whose sum is σ = 448041600. Its totient is φ = 125750880.

The previous prime is 243772037. The next prime is 243772073. The reversal of 243772065 is 560277342.

It is a happy number.

243772065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243772065 - 2⁸ = 243771809 is a prime.

It is a super-3 number, since 3×243772065³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128796 + ... + 130674.

It is an arithmetic number, because the mean of its divisors is an integer number (9334200).

Almost surely, 2^243772065 is an apocalyptic number.

It is an amenable number.

243772065 is a deficient number, since it is larger than the sum of its proper divisors (204269535).

243772065 is a wasteful number, since it uses less digits than its factorization.

243772065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 243772065 is about 15613.2016255475. The cubic root of 243772065 is about 624.6853370728.

The spelling of 243772065 in words is "two hundred forty-three million, seven hundred seventy-two thousand, sixty-five".