231201215 has 16 divisors (see below), whose sum is σ = 333765120. Its totient is φ = 150193440.

The previous prime is 231201203. The next prime is 231201227. The reversal of 231201215 is 512102132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231201203) and next prime (231201227).

It is not a de Polignac number, because 231201215 - 2⁴ = 231201199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231201193 and 231201202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173171 + ... + 174500.

It is an arithmetic number, because the mean of its divisors is an integer number (20860320).

Almost surely, 2^231201215 is an apocalyptic number.

231201215 is a deficient number, since it is larger than the sum of its proper divisors (102563905).

231201215 is a wasteful number, since it uses less digits than its factorization.

231201215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347702.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 231201215 is about 15205.3022002195. The cubic root of 231201215 is about 613.7573471660.

Adding to 231201215 its reverse (512102132), we get a palindrome (743303347).

The spelling of 231201215 in words is "two hundred thirty-one million, two hundred one thousand, two hundred fifteen".