516561001 has 8 divisors (see below), whose sum is σ = 564447744. Its totient is φ = 468828720.

The previous prime is 516560983. The next prime is 516561007. The reversal of 516561001 is 100165615.

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 516561001 - 2¹¹ = 516558953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516561007) 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, 31561 + ... + 45046.

It is an arithmetic number, because the mean of its divisors is an integer number (70555968).

Almost surely, 2^516561001 is an apocalyptic number.

It is an amenable number.

516561001 is a deficient number, since it is larger than the sum of its proper divisors (47886743).

516561001 is a wasteful number, since it uses less digits than its factorization.

516561001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77231.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 516561001 is about 22727.9783746817. The cubic root of 516561001 is about 802.3685021807.

It can be divided in two parts, 5165 and 61001, that added together give a palindrome (66166).

The spelling of 516561001 in words is "five hundred sixteen million, five hundred sixty-one thousand, one".