2521211216 has 10 divisors (see below), whose sum is σ = 4884846762. Its totient is φ = 1260605600.

The previous prime is 2521211201. The next prime is 2521211257. The reversal of 2521211216 is 6121121252.

It can be written as a sum of positive squares in only one way, i.e., 1351297600 + 1169913616 = 36760^2 + 34204^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2521211191 and 2521211200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78787835 + ... + 78787866.

Almost surely, 2^2521211216 is an apocalyptic number.

It is an amenable number.

2521211216 is a deficient number, since it is larger than the sum of its proper divisors (2363635546).

2521211216 is a wasteful number, since it uses less digits than its factorization.

2521211216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157575709 (or 157575703 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 2521211216 is about 50211.6641429061. The cubic root of 2521211216 is about 1361.0364101015.

Adding to 2521211216 its reverse (6121121252), we get a palindrome (8642332468).

The spelling of 2521211216 in words is "two billion, five hundred twenty-one million, two hundred eleven thousand, two hundred sixteen".