2152500040 has 16 divisors (see below), whose sum is σ = 4843125180. Its totient is φ = 861000000.

The previous prime is 2152500019. The next prime is 2152500047. The reversal of 2152500040 is 400052512.

It can be written as a sum of positive squares in 2 ways, for example, as 2111770116 + 40729924 = 45954^2 + 6382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2152499990 and 2152500017.

It is not an unprimeable number, because it can be changed into a prime (2152500047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26906211 + ... + 26906290.

Almost surely, 2^2152500040 is an apocalyptic number.

2152500040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2152500040 is an abundant number, since it is smaller than the sum of its proper divisors (2690625140).

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

2152500040 is a wasteful number, since it uses less digits than its factorization.

2152500040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53812512 (or 53812508 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2152500040 is about 46395.0432697287. The cubic root of 2152500040 is about 1291.1629518296.

Adding to 2152500040 its reverse (400052512), we get a palindrome (2552552552).

The spelling of 2152500040 in words is "two billion, one hundred fifty-two million, five hundred thousand, forty".