1522521216 has 48 divisors (see below), whose sum is σ = 4381216710. Its totient is φ = 507506688.

The previous prime is 1522521181. The next prime is 1522521229. The reversal of 1522521216 is 6121252251.

1522521216 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1513521216 + 9000000 = 38904^2 + 3000^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1522521216.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 659665 + ... + 661968.

Almost surely, 2^1522521216 is an apocalyptic number.

1522521216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1522521216 is an abundant number, since it is smaller than the sum of its proper divisors (2858695494).

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

1522521216 is a wasteful number, since it uses less digits than its factorization.

1522521216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321653 (or 1321638 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1522521216 is about 39019.4978952831. The cubic root of 1522521216 is about 1150.4147756508.

Adding to 1522521216 its reverse (6121252251), we get a palindrome (7643773467).

The spelling of 1522521216 in words is "one billion, five hundred twenty-two million, five hundred twenty-one thousand, two hundred sixteen".