2145430240 has 24 divisors (see below), whose sum is σ = 5068579320. Its totient is φ = 858172032.

The previous prime is 2145430219. The next prime is 2145430241. The reversal of 2145430240 is 420345412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145430241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6704310 + ... + 6704629.

It is an arithmetic number, because the mean of its divisors is an integer number (211190805).

Almost surely, 2^2145430240 is an apocalyptic number.

2145430240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145430240 is an abundant number, since it is smaller than the sum of its proper divisors (2923149080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145430240 is a wasteful number, since it uses less digits than its factorization.

2145430240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13408954 (or 13408946 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2145430240 is about 46318.7892760595. The cubic root of 2145430240 is about 1289.7478104051.

Adding to 2145430240 its reverse (420345412), we get a palindrome (2565775652).

The spelling of 2145430240 in words is "two billion, one hundred forty-five million, four hundred thirty thousand, two hundred forty".