516152921 has 2 divisors, whose sum is σ = 516152922. Its totient is φ = 516152920.

The previous prime is 516152911. The next prime is 516152927. The reversal of 516152921 is 129251615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286963600 + 229189321 = 16940^2 + 15139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516152921 is a prime.

It is not a weakly prime, because it can be changed into another prime (516152927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258076460 + 258076461.

It is an arithmetic number, because the mean of its divisors is an integer number (258076461).

Almost surely, 2^516152921 is an apocalyptic number.

It is an amenable number.

516152921 is a deficient number, since it is larger than the sum of its proper divisors (1).

516152921 is an equidigital number, since it uses as much as digits as its factorization.

516152921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 32.

The square root of 516152921 is about 22718.9991196795. Note that the first 3 decimals coincide. The cubic root of 516152921 is about 802.1571577972.

The spelling of 516152921 in words is "five hundred sixteen million, one hundred fifty-two thousand, nine hundred twenty-one".