2115131523 has 8 divisors (see below), whose sum is σ = 2820619536. Its totient is φ = 1409865600.

The previous prime is 2115131489. The next prime is 2115131531. The reversal of 2115131523 is 3251315112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2115131523 - 2¹⁰ = 2115130499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2115131493 and 2115131502.

It is not an unprimeable number, because it can be changed into a prime (2115135523) 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, 31858 + ... + 72423.

It is an arithmetic number, because the mean of its divisors is an integer number (352577442).

Almost surely, 2^2115131523 is an apocalyptic number.

2115131523 is a deficient number, since it is larger than the sum of its proper divisors (705488013).

2115131523 is a wasteful number, since it uses less digits than its factorization.

2115131523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111045.

The product of its digits is 900, while the sum is 24.

The square root of 2115131523 is about 45990.5590637905. The cubic root of 2115131523 is about 1283.6475392715.

Adding to 2115131523 its reverse (3251315112), we get a palindrome (5366446635).

The spelling of 2115131523 in words is "two billion, one hundred fifteen million, one hundred thirty-one thousand, five hundred twenty-three".