2521630040 has 32 divisors (see below), whose sum is σ = 5869314000. Its totient is φ = 973870464.

The previous prime is 2521630039. The next prime is 2521630063. The reversal of 2521630040 is 400361252.

It is a junction number, because it is equal to n+sod(n) for n = 2521629988 and 2521630015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085750 + ... + 1088069.

Almost surely, 2^2521630040 is an apocalyptic number.

2521630040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521630040 is an abundant number, since it is smaller than the sum of its proper divisors (3347683960).

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

2521630040 is a wasteful number, since it uses less digits than its factorization.

2521630040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173859 (or 2173855 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2521630040 is about 50215.8345544510. The cubic root of 2521630040 is about 1361.1117711222. Note that the first 3 decimals are identical.

Adding to 2521630040 its reverse (400361252), we get a palindrome (2921991292).

The spelling of 2521630040 in words is "two billion, five hundred twenty-one million, six hundred thirty thousand, forty".