2143515220 has 48 divisors (see below), whose sum is σ = 5612116608. Its totient is φ = 668108160.

The previous prime is 2143515211. The next prime is 2143515221. The reversal of 2143515220 is 225153412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143515221) 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, 694407 + ... + 697486.

It is an arithmetic number, because the mean of its divisors is an integer number (116919096).

Almost surely, 2^2143515220 is an apocalyptic number.

2143515220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143515220 is an abundant number, since it is smaller than the sum of its proper divisors (3468601388).

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

2143515220 is a wasteful number, since it uses less digits than its factorization.

2143515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391920 (or 1391918 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2143515220 is about 46298.1124885238. The cubic root of 2143515220 is about 1289.3639514089.

Adding to 2143515220 its reverse (225153412), we get a palindrome (2368668632).

The spelling of 2143515220 in words is "two billion, one hundred forty-three million, five hundred fifteen thousand, two hundred twenty".