2115553513 has 4 divisors (see below), whose sum is σ = 2124873360. Its totient is φ = 2106233668.

The previous prime is 2115553511. The next prime is 2115553529. The reversal of 2115553513 is 3153555112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2115553513 - 2¹ = 2115553511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115553511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4659583 + ... + 4660036.

It is an arithmetic number, because the mean of its divisors is an integer number (531218340).

Almost surely, 2^2115553513 is an apocalyptic number.

It is an amenable number.

2115553513 is a deficient number, since it is larger than the sum of its proper divisors (9319847).

2115553513 is an equidigital number, since it uses as much as digits as its factorization.

2115553513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319846.

The product of its digits is 11250, while the sum is 31.

The square root of 2115553513 is about 45995.1466243994. The cubic root of 2115553513 is about 1283.7329004573.

The spelling of 2115553513 in words is "two billion, one hundred fifteen million, five hundred fifty-three thousand, five hundred thirteen".