243545413 has 4 divisors (see below), whose sum is σ = 254134368. Its totient is φ = 232956460.

The previous prime is 243545411. The next prime is 243545443. The reversal of 243545413 is 314545342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243545413 - 2¹ = 243545411 is a prime.

It is a super-3 number, since 3×243545413³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243545411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5294443 + ... + 5294488.

It is an arithmetic number, because the mean of its divisors is an integer number (63533592).

Almost surely, 2^243545413 is an apocalyptic number.

243545413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

243545413 is a deficient number, since it is larger than the sum of its proper divisors (10588955).

243545413 is a wasteful number, since it uses less digits than its factorization.

243545413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10588954.

The product of its digits is 28800, while the sum is 31.

The square root of 243545413 is about 15605.9415928678. The cubic root of 243545413 is about 624.4916724370.

The spelling of 243545413 in words is "two hundred forty-three million, five hundred forty-five thousand, four hundred thirteen".