243299475 has 18 divisors (see below), whose sum is σ = 435776796. Its totient is φ = 129759600.

The previous prime is 243299443. The next prime is 243299479. The reversal of 243299475 is 574992342.

It is not a de Polignac number, because 243299475 - 2⁵ = 243299443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 243299475.

It is not an unprimeable number, because it can be changed into a prime (243299479) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 540441 + ... + 540890.

It is an arithmetic number, because the mean of its divisors is an integer number (24209822).

Almost surely, 2^243299475 is an apocalyptic number.

243299475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243299475 is a deficient number, since it is larger than the sum of its proper divisors (192477321).

243299475 is a wasteful number, since it uses less digits than its factorization.

243299475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081347 (or 1081339 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 243299475 is about 15598.0599755226. The cubic root of 243299475 is about 624.2813927491.

The spelling of 243299475 in words is "two hundred forty-three million, two hundred ninety-nine thousand, four hundred seventy-five".