243264891 has 8 divisors (see below), whose sum is σ = 324726544. Its totient is φ = 161989920.

The previous prime is 243264881. The next prime is 243264893. The reversal of 243264891 is 198462342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243264891 - 2¹⁷ = 243133819 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (243264893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43600 + ... + 48861.

It is an arithmetic number, because the mean of its divisors is an integer number (40590818).

Almost surely, 2^243264891 is an apocalyptic number.

243264891 is a deficient number, since it is larger than the sum of its proper divisors (81461653).

243264891 is an equidigital number, since it uses as much as digits as its factorization.

243264891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93341.

The product of its digits is 82944, while the sum is 39.

The square root of 243264891 is about 15596.9513367196. The cubic root of 243264891 is about 624.2518116869.

The spelling of 243264891 in words is "two hundred forty-three million, two hundred sixty-four thousand, eight hundred ninety-one".