516401023 has 2 divisors, whose sum is σ = 516401024. Its totient is φ = 516401022.

The previous prime is 516401009. The next prime is 516401033. The reversal of 516401023 is 320104615.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516401023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 516400985 and 516401003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516401033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258200511 + 258200512.

It is an arithmetic number, because the mean of its divisors is an integer number (258200512).

Almost surely, 2^516401023 is an apocalyptic number.

516401023 is a deficient number, since it is larger than the sum of its proper divisors (1).

516401023 is an equidigital number, since it uses as much as digits as its factorization.

516401023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 516401023 is about 22724.4586954233. The cubic root of 516401023 is about 802.2856629411.

Adding to 516401023 its reverse (320104615), we get a palindrome (836505638).

The spelling of 516401023 in words is "five hundred sixteen million, four hundred one thousand, twenty-three".