2131413345 has 40 divisors (see below), whose sum is σ = 3854650536. Its totient is φ = 1126669824.

The previous prime is 2131413343. The next prime is 2131413367. The reversal of 2131413345 is 5433141312.

It is a happy number.

2131413345 is a `hidden beast` number, since 2 + 1 + 314 + 1 + 3 + 345 = 666.

2131413345 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 265950864 + 1865462481 = 16308^2 + 43191^2 .

It is not a de Polignac number, because 2131413345 - 2¹ = 2131413343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2131413343) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22479 + ... + 69051.

Almost surely, 2^2131413345 is an apocalyptic number.

It is an amenable number.

2131413345 is a deficient number, since it is larger than the sum of its proper divisors (1723237191).

2131413345 is a wasteful number, since it uses less digits than its factorization.

2131413345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46703 (or 46694 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2131413345 is about 46167.2323731887. The cubic root of 2131413345 is about 1286.9328701517.

Adding to 2131413345 its reverse (5433141312), we get a palindrome (7564554657).

The spelling of 2131413345 in words is "two billion, one hundred thirty-one million, four hundred thirteen thousand, three hundred forty-five".