2145405311 has 12 divisors (see below), whose sum is σ = 2587733712. Its totient is φ = 1742131584.

The previous prime is 2145405307. The next prime is 2145405323. The reversal of 2145405311 is 1135045412.

It is not a de Polignac number, because 2145405311 - 2² = 2145405307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145405371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421970 + ... + 427023.

It is an arithmetic number, because the mean of its divisors is an integer number (215644476).

Almost surely, 2^2145405311 is an apocalyptic number.

2145405311 is a deficient number, since it is larger than the sum of its proper divisors (442328401).

2145405311 is an equidigital number, since it uses as much as digits as its factorization.

2145405311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849038 (or 849019 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2145405311 is about 46318.5201728207. The cubic root of 2145405311 is about 1289.7428149428.

The spelling of 2145405311 in words is "two billion, one hundred forty-five million, four hundred five thousand, three hundred eleven".