1521320532 has 12 divisors (see below), whose sum is σ = 3549747936. Its totient is φ = 507106840.

The previous prime is 1521320513. The next prime is 1521320561. The reversal of 1521320532 is 2350231251.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1521320532² = 4628832322169526048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63388344 + ... + 63388367.

It is an arithmetic number, because the mean of its divisors is an integer number (295812328).

Almost surely, 2^1521320532 is an apocalyptic number.

1521320532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1521320532 is an abundant number, since it is smaller than the sum of its proper divisors (2028427404).

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

1521320532 is a wasteful number, since it uses less digits than its factorization.

1521320532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126776718 (or 126776716 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1521320532 is about 39004.1091681377. The cubic root of 1521320532 is about 1150.1122844365.

Adding to 1521320532 its reverse (2350231251), we get a palindrome (3871551783).

The spelling of 1521320532 in words is "one billion, five hundred twenty-one million, three hundred twenty thousand, five hundred thirty-two".