516390191 has 8 divisors (see below), whose sum is σ = 523704480. Its totient is φ = 509120352.

The previous prime is 516390187. The next prime is 516390197. The reversal of 516390191 is 191093615.

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

It is a cyclic number.

It is not a de Polignac number, because 516390191 - 2² = 516390187 is a prime.

It is a super-2 number, since 2×516390191² = 533317658722032962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516390197) 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, 12641 + ... + 34533.

It is an arithmetic number, because the mean of its divisors is an integer number (65463060).

Almost surely, 2^516390191 is an apocalyptic number.

516390191 is a deficient number, since it is larger than the sum of its proper divisors (7314289).

516390191 is a wasteful number, since it uses less digits than its factorization.

516390191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22225.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 516390191 is about 22724.2203606636. The cubic root of 516390191 is about 802.2800533350.

The spelling of 516390191 in words is "five hundred sixteen million, three hundred ninety thousand, one hundred ninety-one".