516530121 has 16 divisors (see below), whose sum is σ = 692664000. Its totient is φ = 342381888.

The previous prime is 516530117. The next prime is 516530137. The reversal of 516530121 is 121035615.

It is not a de Polignac number, because 516530121 - 2² = 516530117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 516530091 and 516530100.

It is not an unprimeable number, because it can be changed into a prime (516530111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647695 + ... + 648491.

It is an arithmetic number, because the mean of its divisors is an integer number (43291500).

Almost surely, 2^516530121 is an apocalyptic number.

It is an amenable number.

516530121 is a deficient number, since it is larger than the sum of its proper divisors (176133879).

516530121 is a wasteful number, since it uses less digits than its factorization.

516530121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 516530121 is about 22727.2990256211. The cubic root of 516530121 is about 802.3525133410.

Adding to 516530121 its reverse (121035615), we get a palindrome (637565736).

The spelling of 516530121 in words is "five hundred sixteen million, five hundred thirty thousand, one hundred twenty-one".