5517100921 has 4 divisors (see below), whose sum is σ = 5522041252. Its totient is φ = 5512160592.

The previous prime is 5517100859. The next prime is 5517100931. The reversal of 5517100921 is 1290017155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 476810896 + 5040290025 = 21836^2 + 70995^2 .

It is a cyclic number.

It is not a de Polignac number, because 5517100921 - 2⁷ = 5517100793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5517100931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2468490 + ... + 2470723.

It is an arithmetic number, because the mean of its divisors is an integer number (1380510313).

Almost surely, 2^5517100921 is an apocalyptic number.

It is an amenable number.

5517100921 is a deficient number, since it is larger than the sum of its proper divisors (4940331).

5517100921 is a wasteful number, since it uses less digits than its factorization.

5517100921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940330.

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 5517100921 is about 74277.1897758659. The cubic root of 5517100921 is about 1767.0017356907.

The spelling of 5517100921 in words is "five billion, five hundred seventeen million, one hundred thousand, nine hundred twenty-one".