516324021 has 8 divisors (see below), whose sum is σ = 688622400. Its totient is φ = 344120832.

The previous prime is 516323981. The next prime is 516324023. The reversal of 516324021 is 120423615.

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

It is not a de Polignac number, because 516324021 - 2⁶ = 516323957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 516323982 and 516324000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516324023) 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, 9996 + ... + 33653.

It is an arithmetic number, because the mean of its divisors is an integer number (86077800).

Almost surely, 2^516324021 is an apocalyptic number.

It is an amenable number.

516324021 is a deficient number, since it is larger than the sum of its proper divisors (172298379).

516324021 is a wasteful number, since it uses less digits than its factorization.

516324021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47595.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 516324021 is about 22722.7643784818. The cubic root of 516324021 is about 802.2457839396.

Adding to 516324021 its reverse (120423615), we get a palindrome (636747636).

The spelling of 516324021 in words is "five hundred sixteen million, three hundred twenty-four thousand, twenty-one".