2521205516 has 6 divisors (see below), whose sum is σ = 4412109660. Its totient is φ = 1260602756.

The previous prime is 2521205501. The next prime is 2521205549. The reversal of 2521205516 is 6155021252.

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 as a sum of consecutive naturals, namely, 315150686 + ... + 315150693.

It is an arithmetic number, because the mean of its divisors is an integer number (735351610).

Almost surely, 2^2521205516 is an apocalyptic number.

It is an amenable number.

2521205516 is a deficient number, since it is larger than the sum of its proper divisors (1890904144).

2521205516 is a wasteful number, since it uses less digits than its factorization.

2521205516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630301383 (or 630301381 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 2521205516 is about 50211.6073831539. The cubic root of 2521205516 is about 1361.0353844155.

Adding to 2521205516 its reverse (6155021252), we get a palindrome (8676226768).

The spelling of 2521205516 in words is "two billion, five hundred twenty-one million, two hundred five thousand, five hundred sixteen".