231215017 has 8 divisors (see below), whose sum is σ = 255690720. Its totient is φ = 207315360.

The previous prime is 231214993. The next prime is 231215029. The reversal of 231215017 is 710512132.

It is a happy number.

231215017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 231215017 - 2⁷ = 231214889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231215077) 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, 143167 + ... + 144772.

It is an arithmetic number, because the mean of its divisors is an integer number (31961340).

Almost surely, 2^231215017 is an apocalyptic number.

It is an amenable number.

231215017 is a deficient number, since it is larger than the sum of its proper divisors (24475703).

231215017 is a wasteful number, since it uses less digits than its factorization.

231215017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288023.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 231215017 is about 15205.7560482865. The cubic root of 231215017 is about 613.7695600637.

Adding to 231215017 its reverse (710512132), we get a palindrome (941727149).

The spelling of 231215017 in words is "two hundred thirty-one million, two hundred fifteen thousand, seventeen".