243150391 has 16 divisors (see below), whose sum is σ = 288230400. Its totient is φ = 202651200.

The previous prime is 243150389. The next prime is 243150407. The reversal of 243150391 is 193051342.

It is a cyclic number.

It is not a de Polignac number, because 243150391 - 2¹ = 243150389 is a prime.

It is a super-2 number, since 2×243150391² = 118244225286905762, which contains 22 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 (243150491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12286 + ... + 25243.

It is an arithmetic number, because the mean of its divisors is an integer number (18014400).

Almost surely, 2^243150391 is an apocalyptic number.

243150391 is a deficient number, since it is larger than the sum of its proper divisors (45080009).

243150391 is a wasteful number, since it uses less digits than its factorization.

243150391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37590.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 243150391 is about 15593.2803155718. The cubic root of 243150391 is about 624.1538552996.

The spelling of 243150391 in words is "two hundred forty-three million, one hundred fifty thousand, three hundred ninety-one".