231513500451015 has 24 divisors (see below), whose sum is σ = 401431217887440. Its totient is φ = 123430436002944.

The previous prime is 231513500450989. The next prime is 231513500451043. The reversal of 231513500451015 is 510154005315132.

231513500451015 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 1 + 3 + 500 + 45 + 101 + 5 = 666.

It is not a de Polignac number, because 231513500451015 - 2⁶ = 231513500450951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 904681150 + ... + 904937019.

It is an arithmetic number, because the mean of its divisors is an integer number (16726300745310).

Almost surely, 2^{231513500451015} is an apocalyptic number.

231513500451015 is a deficient number, since it is larger than the sum of its proper divisors (169917717436425).

231513500451015 is a wasteful number, since it uses less digits than its factorization.

231513500451015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809621023 (or 1809621020 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

Adding to 231513500451015 its reverse (510154005315132), we get a palindrome (741667505766147).

The spelling of 231513500451015 in words is "two hundred thirty-one trillion, five hundred thirteen billion, five hundred million, four hundred fifty-one thousand, fifteen".