5511920821 has 8 divisors (see below), whose sum is σ = 6175518624. Its totient is φ = 4875408720.

The previous prime is 5511920803. The next prime is 5511920831. The reversal of 5511920821 is 1280291155.

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 5511920821 - 2²⁹ = 4975049909 is a prime.

It is a super-2 number, since 2×5511920821² = 60762542273946628082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5511920831) 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, 6770995 + ... + 6771808.

It is an arithmetic number, because the mean of its divisors is an integer number (771939828).

Almost surely, 2^5511920821 is an apocalyptic number.

It is an amenable number.

5511920821 is a deficient number, since it is larger than the sum of its proper divisors (663597803).

5511920821 is a wasteful number, since it uses less digits than its factorization.

5511920821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13542851.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 5511920821 is about 74242.3115278613. The cubic root of 5511920821 is about 1766.4485398468.

The spelling of 5511920821 in words is "five billion, five hundred eleven million, nine hundred twenty thousand, eight hundred twenty-one".