2131420340 has 24 divisors (see below), whose sum is σ = 5115409152. Its totient is φ = 730772640.

The previous prime is 2131420321. The next prime is 2131420363. The reversal of 2131420340 is 430241312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7612076 + ... + 7612355.

It is an arithmetic number, because the mean of its divisors is an integer number (213142048).

Almost surely, 2^2131420340 is an apocalyptic number.

2131420340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131420340 is an abundant number, since it is smaller than the sum of its proper divisors (2983988812).

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

2131420340 is a wasteful number, since it uses less digits than its factorization.

2131420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15224447 (or 15224445 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2131420340 is about 46167.3081303210. The cubic root of 2131420340 is about 1286.9342779946.

Adding to 2131420340 its reverse (430241312), we get a palindrome (2561661652).

The spelling of 2131420340 in words is "two billion, one hundred thirty-one million, four hundred twenty thousand, three hundred forty".