243099131 has 8 divisors (see below), whose sum is σ = 265529664. Its totient is φ = 220723720.

The previous prime is 243099113. The next prime is 243099151. The reversal of 243099131 is 131990342.

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

It is a cyclic number.

It is not a de Polignac number, because 243099131 - 2²⁶ = 175990267 is a prime.

It is a super-2 number, since 2×243099131² = 118194374985910322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243099151) 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, 4265 + ... + 22458.

It is an arithmetic number, because the mean of its divisors is an integer number (33191208).

Almost surely, 2^243099131 is an apocalyptic number.

243099131 is a deficient number, since it is larger than the sum of its proper divisors (22430533).

243099131 is a wasteful number, since it uses less digits than its factorization.

243099131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27561.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 243099131 is about 15591.6365722140. The cubic root of 243099131 is about 624.1099916712.

The spelling of 243099131 in words is "two hundred forty-three million, ninety-nine thousand, one hundred thirty-one".