2521621012 has 12 divisors (see below), whose sum is σ = 4438345716. Its totient is φ = 1253522240.

The previous prime is 2521620949. The next prime is 2521621051. The reversal of 2521621012 is 2101261252.

It can be written as a sum of positive squares in 2 ways, for example, as 2261573136 + 260047876 = 47556^2 + 16126^2 .

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 3 ways as a sum of consecutive naturals, for example, 1821289 + ... + 1822672.

It is an arithmetic number, because the mean of its divisors is an integer number (369862143).

Almost surely, 2^2521621012 is an apocalyptic number.

It is an amenable number.

2521621012 is a deficient number, since it is larger than the sum of its proper divisors (1916724704).

2521621012 is a wasteful number, since it uses less digits than its factorization.

2521621012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644138 (or 3644136 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2521621012 is about 50215.7446624064. The cubic root of 2521621012 is about 1361.1101467587.

Adding to 2521621012 its reverse (2101261252), we get a palindrome (4622882264).

The spelling of 2521621012 in words is "two billion, five hundred twenty-one million, six hundred twenty-one thousand, twelve".