516172823 has 2 divisors, whose sum is σ = 516172824. Its totient is φ = 516172822.

The previous prime is 516172781. The next prime is 516172837. The reversal of 516172823 is 328271615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 516172823 - 2⁶ = 516172759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516172843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258086411 + 258086412.

It is an arithmetic number, because the mean of its divisors is an integer number (258086412).

Almost surely, 2^516172823 is an apocalyptic number.

516172823 is a deficient number, since it is larger than the sum of its proper divisors (1).

516172823 is an equidigital number, since it uses as much as digits as its factorization.

516172823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 516172823 is about 22719.4371189077. The cubic root of 516172823 is about 802.1674676142.

The spelling of 516172823 in words is "five hundred sixteen million, one hundred seventy-two thousand, eight hundred twenty-three".