2135518031 has 4 divisors (see below), whose sum is σ = 2135809200. Its totient is φ = 2135226864.

The previous prime is 2135518009. The next prime is 2135518067. The reversal of 2135518031 is 1308155312.

It is a happy number.

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-2135518031 is a prime.

It is a super-2 number, since 2×2135518031² = 9120874521452233922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2135517985 and 2135518003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135518531) 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, 134291 + ... + 149348.

It is an arithmetic number, because the mean of its divisors is an integer number (533952300).

Almost surely, 2^2135518031 is an apocalyptic number.

2135518031 is a deficient number, since it is larger than the sum of its proper divisors (291169).

2135518031 is an equidigital number, since it uses as much as digits as its factorization.

2135518031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291168.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2135518031 is about 46211.6655293877. The cubic root of 2135518031 is about 1287.7584675545.

The spelling of 2135518031 in words is "two billion, one hundred thirty-five million, five hundred eighteen thousand, thirty-one".