516421031 has 8 divisors (see below), whose sum is σ = 591022080. Its totient is φ = 442026648.

The previous prime is 516421027. The next prime is 516421039. The reversal of 516421031 is 130124615.

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

It is not a de Polignac number, because 516421031 - 2² = 516421027 is a prime.

It is a super-2 number, since 2×516421031² = 533381362518205922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 516420988 and 516421006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516421039) 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, 46271 + ... + 56336.

It is an arithmetic number, because the mean of its divisors is an integer number (73877760).

Almost surely, 2^516421031 is an apocalyptic number.

516421031 is a deficient number, since it is larger than the sum of its proper divisors (74601049).

516421031 is a wasteful number, since it uses less digits than its factorization.

516421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103333.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 516421031 is about 22724.8989216674. The cubic root of 516421031 is about 802.2960243486.

Adding to 516421031 its reverse (130124615), we get a palindrome (646545646).

The spelling of 516421031 in words is "five hundred sixteen million, four hundred twenty-one thousand, thirty-one".