243205151 has 8 divisors (see below), whose sum is σ = 290033664. Its totient is φ = 199397880.

The previous prime is 243205147. The next prime is 243205159. The reversal of 243205151 is 151502342.

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 243205151 - 2² = 243205147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243205159) 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, 755135 + ... + 755456.

It is an arithmetic number, because the mean of its divisors is an integer number (36254208).

Almost surely, 2^243205151 is an apocalyptic number.

243205151 is a deficient number, since it is larger than the sum of its proper divisors (46828513).

243205151 is a wasteful number, since it uses less digits than its factorization.

243205151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510621.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 243205151 is about 15595.0361012727. The cubic root of 243205151 is about 624.2007070985.

Adding to 243205151 its reverse (151502342), we get a palindrome (394707493).

The spelling of 243205151 in words is "two hundred forty-three million, two hundred five thousand, one hundred fifty-one".