2016551021515 has 8 divisors (see below), whose sum is σ = 2419884695520. Its totient is φ = 1613225170752.

The previous prime is 2016551021497. The next prime is 2016551021519. The reversal of 2016551021515 is 5151201556102.

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

It is a cyclic number.

It is not a de Polignac number, because 2016551021515 - 2¹¹ = 2016551019467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2016551021519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372935 + ... + 2432704.

It is an arithmetic number, because the mean of its divisors is an integer number (302485586940).

Almost surely, 2^{2016551021515} is an apocalyptic number.

2016551021515 is a deficient number, since it is larger than the sum of its proper divisors (403333674005).

2016551021515 is a wasteful number, since it uses less digits than its factorization.

2016551021515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911621.

The product of its (nonzero) digits is 15000, while the sum is 34.

Adding to 2016551021515 its reverse (5151201556102), we get a palindrome (7167752577617).

The spelling of 2016551021515 in words is "two trillion, sixteen billion, five hundred fifty-one million, twenty-one thousand, five hundred fifteen".