231515014430135 has 4 divisors (see below), whose sum is σ = 277818017316168. Its totient is φ = 185212011544104.

The previous prime is 231515014430113. The next prime is 231515014430137. The reversal of 231515014430135 is 531034410515132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231515014430135 is a prime.

It is a super-2 number, since 2×231515014430135² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231515014430137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23151501443009 + ... + 23151501443018.

It is an arithmetic number, because the mean of its divisors is an integer number (69454504329042).

Almost surely, 2^{231515014430135} is an apocalyptic number.

231515014430135 is a deficient number, since it is larger than the sum of its proper divisors (46303002886033).

231515014430135 is an equidigital number, since it uses as much as digits as its factorization.

231515014430135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46303002886032.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 231515014430135 its reverse (531034410515132), we get a palindrome (762549424945267).

The spelling of 231515014430135 in words is "two hundred thirty-one trillion, five hundred fifteen billion, fourteen million, four hundred thirty thousand, one hundred thirty-five".