243206157 has 8 divisors (see below), whose sum is σ = 324756576. Its totient is φ = 161896592.

The previous prime is 243206147. The next prime is 243206167. The reversal of 243206157 is 751602342.

243206157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243206147) and next prime (243206167).

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 243206157 - 2¹⁰ = 243205133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243206107) 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, 57843 + ... + 61904.

It is an arithmetic number, because the mean of its divisors is an integer number (40594572).

Almost surely, 2^243206157 is an apocalyptic number.

It is an amenable number.

243206157 is a deficient number, since it is larger than the sum of its proper divisors (81550419).

243206157 is a wasteful number, since it uses less digits than its factorization.

243206157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120427.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 243206157 is about 15595.0683550923. The cubic root of 243206157 is about 624.2015677505.

Adding to 243206157 its reverse (751602342), we get a palindrome (994808499).

The spelling of 243206157 in words is "two hundred forty-three million, two hundred six thousand, one hundred fifty-seven".