231501050215 has 16 divisors (see below), whose sum is σ = 287477942400. Its totient is φ = 178754044672.

The previous prime is 231501050201. The next prime is 231501050279. The reversal of 231501050215 is 512050105132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231501050215 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231501050215.

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, 161634 + ... + 699376.

It is an arithmetic number, because the mean of its divisors is an integer number (17967371400).

Almost surely, 2^231501050215 is an apocalyptic number.

231501050215 is a deficient number, since it is larger than the sum of its proper divisors (55976892185).

231501050215 is a wasteful number, since it uses less digits than its factorization.

231501050215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540746.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 231501050215 its reverse (512050105132), we get a palindrome (743551155347).

The spelling of 231501050215 in words is "two hundred thirty-one billion, five hundred one million, fifty thousand, two hundred fifteen".