2185313040 has 80 divisors (see below), whose sum is σ = 7527196800. Its totient is φ = 582749568.

The previous prime is 2185313033. The next prime is 2185313041. The reversal of 2185313040 is 403135812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a junction number, because it is equal to n+sod(n) for n = 2185312995 and 2185313013.

It is not an unprimeable number, because it can be changed into a prime (2185313041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503700 + ... + 508019.

It is an arithmetic number, because the mean of its divisors is an integer number (94089960).

Almost surely, 2^2185313040 is an apocalyptic number.

2185313040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2185313040 is an abundant number, since it is smaller than the sum of its proper divisors (5341883760).

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

2185313040 is a wasteful number, since it uses less digits than its factorization.

2185313040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011741 (or 1011729 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2185313040 is about 46747.3319024733. The cubic root of 2185313040 is about 1297.6907801931.

Adding to 2185313040 its reverse (403135812), we get a palindrome (2588448852).

The spelling of 2185313040 in words is "two billion, one hundred eighty-five million, three hundred thirteen thousand, forty".