243436545 has 48 divisors (see below), whose sum is σ = 471062592. Its totient is φ = 115274880.

The previous prime is 243436541. The next prime is 243436553. The reversal of 243436545 is 545634342.

It is not a de Polignac number, because 243436545 - 2² = 243436541 is a prime.

It is a super-2 number, since 2×243436545² = 118522702883074050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (243436541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15567 + ... + 27003.

It is an arithmetic number, because the mean of its divisors is an integer number (9813804).

Almost surely, 2^243436545 is an apocalyptic number.

It is an amenable number.

243436545 is a deficient number, since it is larger than the sum of its proper divisors (227626047).

243436545 is a wasteful number, since it uses less digits than its factorization.

243436545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11502 (or 11499 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

The square root of 243436545 is about 15602.4531724982. The cubic root of 243436545 is about 624.3986065738.

The spelling of 243436545 in words is "two hundred forty-three million, four hundred thirty-six thousand, five hundred forty-five".