516659401 has 4 divisors (see below), whose sum is σ = 525416400. Its totient is φ = 507902404.

The previous prime is 516659399. The next prime is 516659417. The reversal of 516659401 is 104956615.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104956615 = 5 ⋅20991323.

It is a cyclic number.

It is not a de Polignac number, because 516659401 - 2¹ = 516659399 is a prime.

It is a super-3 number, since 3×516659401³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516659431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4378411 + ... + 4378528.

It is an arithmetic number, because the mean of its divisors is an integer number (131354100).

Almost surely, 2^516659401 is an apocalyptic number.

It is an amenable number.

516659401 is a deficient number, since it is larger than the sum of its proper divisors (8756999).

516659401 is an equidigital number, since it uses as much as digits as its factorization.

516659401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8756998.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 516659401 is about 22730.1430043896. The cubic root of 516659401 is about 802.4194468241.

The spelling of 516659401 in words is "five hundred sixteen million, six hundred fifty-nine thousand, four hundred one".