231897207 has 8 divisors (see below), whose sum is σ = 315030384. Its totient is φ = 151681088.

The previous prime is 231897179. The next prime is 231897227. The reversal of 231897207 is 702798132.

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 231897207 - 2¹⁰ = 231896183 is a prime.

It is a super-2 number, since 2×231897207² = 107552629228801698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231897227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729078 + ... + 729395.

It is an arithmetic number, because the mean of its divisors is an integer number (39378798).

Almost surely, 2^231897207 is an apocalyptic number.

231897207 is a deficient number, since it is larger than the sum of its proper divisors (83133177).

231897207 is a wasteful number, since it uses less digits than its factorization.

231897207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458529.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 231897207 is about 15228.1714923362. The cubic root of 231897207 is about 614.3726009654.

The spelling of 231897207 in words is "two hundred thirty-one million, eight hundred ninety-seven thousand, two hundred seven".