516630381 has 8 divisors (see below), whose sum is σ = 705641664. Its totient is φ = 336019680.

The previous prime is 516630377. The next prime is 516630409. The reversal of 516630381 is 183036615.

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

It is not a de Polignac number, because 516630381 - 2² = 516630377 is a prime.

It is a super-2 number, since 2×516630381² = 533813901144410322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516630341) 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, 2100001 + ... + 2100246.

It is an arithmetic number, because the mean of its divisors is an integer number (88205208).

Almost surely, 2^516630381 is an apocalyptic number.

It is an amenable number.

516630381 is a deficient number, since it is larger than the sum of its proper divisors (189011283).

516630381 is a wasteful number, since it uses less digits than its factorization.

516630381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200291.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 516630381 is about 22729.5046360452. The cubic root of 516630381 is about 802.4044229687.

Adding to 516630381 its reverse (183036615), we get a palindrome (699666996).

The spelling of 516630381 in words is "five hundred sixteen million, six hundred thirty thousand, three hundred eighty-one".