516531445 has 4 divisors (see below), whose sum is σ = 619837740. Its totient is φ = 413225152.

The previous prime is 516531427. The next prime is 516531527. The reversal of 516531445 is 544135615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544135615 = 5 ⋅108827123.

It can be written as a sum of positive squares in 2 ways, for example, as 129937201 + 386594244 = 11399^2 + 19662^2 .

It is a cyclic number.

It is not a de Polignac number, because 516531445 - 2⁹ = 516530933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 516531445.

It is a congruent number.

It is an unprimeable number.

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, 51653140 + ... + 51653149.

It is an arithmetic number, because the mean of its divisors is an integer number (154959435).

Almost surely, 2^516531445 is an apocalyptic number.

It is an amenable number.

516531445 is a deficient number, since it is larger than the sum of its proper divisors (103306295).

516531445 is a wasteful number, since it uses less digits than its factorization.

516531445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103306294.

The product of its digits is 36000, while the sum is 34.

The square root of 516531445 is about 22727.3281535688. The cubic root of 516531445 is about 802.3531988860.

The spelling of 516531445 in words is "five hundred sixteen million, five hundred thirty-one thousand, four hundred forty-five".