516315493 has 2 divisors, whose sum is σ = 516315494. Its totient is φ = 516315492.

The previous prime is 516315487. The next prime is 516315511. The reversal of 516315493 is 394513615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345699649 + 170615844 = 18593^2 + 13062^2 .

It is a cyclic number.

It is not a de Polignac number, because 516315493 - 2⁵ = 516315461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516315473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258157746 + 258157747.

It is an arithmetic number, because the mean of its divisors is an integer number (258157747).

Almost surely, 2^516315493 is an apocalyptic number.

It is an amenable number.

516315493 is a deficient number, since it is larger than the sum of its proper divisors (1).

516315493 is an equidigital number, since it uses as much as digits as its factorization.

516315493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 37.

The square root of 516315493 is about 22722.5767244826. The cubic root of 516315493 is about 802.2413670816.

The spelling of 516315493 in words is "five hundred sixteen million, three hundred fifteen thousand, four hundred ninety-three".