21532453550515 has 8 divisors (see below), whose sum is σ = 26469162413568. Its totient is φ = 16805817405120.

The previous prime is 21532453550507. The next prime is 21532453550521. The reversal of 21532453550515 is 51505535423512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21532453550515 - 2³ = 21532453550507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52518179187 + ... + 52518179596.

It is an arithmetic number, because the mean of its divisors is an integer number (3308645301696).

Almost surely, 2^{21532453550515} is an apocalyptic number.

21532453550515 is a deficient number, since it is larger than the sum of its proper divisors (4936708863053).

21532453550515 is a wasteful number, since it uses less digits than its factorization.

21532453550515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105036358829.

The product of its (nonzero) digits is 2250000, while the sum is 46.

The spelling of 21532453550515 in words is "twenty-one trillion, five hundred thirty-two billion, four hundred fifty-three million, five hundred fifty thousand, five hundred fifteen".