550921511 has 8 divisors (see below), whose sum is σ = 662762880. Its totient is φ = 447364728.

The previous prime is 550921487. The next prime is 550921513. The reversal of 550921511 is 115129055.

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

It is not a de Polignac number, because 550921511 - 2¹⁴ = 550905127 is a prime.

It is a super-2 number, since 2×550921511² = 607029022565046242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550921513) 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, 2071001 + ... + 2071266.

It is an arithmetic number, because the mean of its divisors is an integer number (82845360).

Almost surely, 2^550921511 is an apocalyptic number.

550921511 is a deficient number, since it is larger than the sum of its proper divisors (111841369).

550921511 is a wasteful number, since it uses less digits than its factorization.

550921511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142293.

The product of its (nonzero) digits is 2250, while the sum is 29.

The square root of 550921511 is about 23471.7172571587. The cubic root of 550921511 is about 819.7785992593.

The spelling of 550921511 in words is "five hundred fifty million, nine hundred twenty-one thousand, five hundred eleven".