516055221 has 24 divisors (see below), whose sum is σ = 813911904. Its totient is φ = 312478560.

The previous prime is 516055201. The next prime is 516055237. The reversal of 516055221 is 122550615.

516055221 is a `hidden beast` number, since 5 + 1 + 605 + 52 + 2 + 1 = 666.

It is not a de Polignac number, because 516055221 - 2¹⁴ = 516038837 is a prime.

It is a super-2 number, since 2×516055221² = 532625982242717682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516055201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175455 + ... + 178371.

It is an arithmetic number, because the mean of its divisors is an integer number (33912996).

Almost surely, 2^516055221 is an apocalyptic number.

It is an amenable number.

516055221 is a deficient number, since it is larger than the sum of its proper divisors (297856683).

516055221 is a wasteful number, since it uses less digits than its factorization.

516055221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4721 (or 4718 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 516055221 is about 22716.8488351708. The cubic root of 516055221 is about 802.1065425005.

The spelling of 516055221 in words is "five hundred sixteen million, fifty-five thousand, two hundred twenty-one".