516821055 has 16 divisors (see below), whose sum is σ = 827591904. Its totient is φ = 275411840.

The previous prime is 516821047. The next prime is 516821117. The reversal of 516821055 is 550128615.

It is not a de Polignac number, because 516821055 - 2³ = 516821047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5665 + ... + 32645.

It is an arithmetic number, because the mean of its divisors is an integer number (51724494).

Almost surely, 2^516821055 is an apocalyptic number.

516821055 is a deficient number, since it is larger than the sum of its proper divisors (310770849).

516821055 is a wasteful number, since it uses less digits than its factorization.

516821055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28266.

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 516821055 is about 22733.6986651974. The cubic root of 516821055 is about 802.5031259280.

The spelling of 516821055 in words is "five hundred sixteen million, eight hundred twenty-one thousand, fifty-five".