1521332099 has 16 divisors (see below), whose sum is σ = 1811552256. Its totient is φ = 1250121600.

The previous prime is 1521332069. The next prime is 1521332107. The reversal of 1521332099 is 9902331251.

It is not a de Polignac number, because 1521332099 - 2²⁸ = 1252896643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521332039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9542 + ... + 55979.

It is an arithmetic number, because the mean of its divisors is an integer number (113222016).

Almost surely, 2^1521332099 is an apocalyptic number.

1521332099 is a deficient number, since it is larger than the sum of its proper divisors (290220157).

1521332099 is a wasteful number, since it uses less digits than its factorization.

1521332099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65666.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 1521332099 is about 39004.2574471044. The cubic root of 1521332099 is about 1150.1151992978.

The spelling of 1521332099 in words is "one billion, five hundred twenty-one million, three hundred thirty-two thousand, ninety-nine".