517162421 has 4 divisors (see below), whose sum is σ = 517553472. Its totient is φ = 516771372.

The previous prime is 517162391. The next prime is 517162433. The reversal of 517162421 is 124261715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517162421 is a prime.

It is a super-3 number, since 3×517162421³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517162621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193535 + ... + 196188.

It is an arithmetic number, because the mean of its divisors is an integer number (129388368).

Almost surely, 2^517162421 is an apocalyptic number.

It is an amenable number.

517162421 is a deficient number, since it is larger than the sum of its proper divisors (391051).

517162421 is a wasteful number, since it uses less digits than its factorization.

517162421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391050.

The product of its digits is 3360, while the sum is 29.

The square root of 517162421 is about 22741.2053550378. The cubic root of 517162421 is about 802.6797744259.

The spelling of 517162421 in words is "five hundred seventeen million, one hundred sixty-two thousand, four hundred twenty-one".