243906465 has 32 divisors (see below), whose sum is σ = 432101376. Its totient is φ = 116487360.

The previous prime is 243906451. The next prime is 243906491. The reversal of 243906465 is 564609342.

It is not a de Polignac number, because 243906465 - 2⁵ = 243906433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24 + ... + 22086.

It is an arithmetic number, because the mean of its divisors is an integer number (13503168).

Almost surely, 2^243906465 is an apocalyptic number.

It is an amenable number.

243906465 is a deficient number, since it is larger than the sum of its proper divisors (188194911).

243906465 is a wasteful number, since it uses less digits than its factorization.

243906465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22149.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 243906465 is about 15617.5050824387. The cubic root of 243906465 is about 624.8001195500.

The spelling of 243906465 in words is "two hundred forty-three million, nine hundred six thousand, four hundred sixty-five".