243920075 has 24 divisors (see below), whose sum is σ = 349575840. Its totient is φ = 165369600.

The previous prime is 243920069. The next prime is 243920077. The reversal of 243920075 is 570029342.

It is a happy number.

It is not a de Polignac number, because 243920075 - 2¹⁶ = 243854539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243920077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7745 + ... + 23405.

It is an arithmetic number, because the mean of its divisors is an integer number (14565660).

Almost surely, 2^243920075 is an apocalyptic number.

243920075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243920075 is a deficient number, since it is larger than the sum of its proper divisors (105655765).

243920075 is a wasteful number, since it uses less digits than its factorization.

243920075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15767 (or 15762 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 243920075 is about 15617.9408053687. The cubic root of 243920075 is about 624.8117406325.

The spelling of 243920075 in words is "two hundred forty-three million, nine hundred twenty thousand, seventy-five".