5151521 has 2 divisors, whose sum is σ = 5151522. Its totient is φ = 5151520.

The previous prime is 5151491. The next prime is 5151533. The reversal of 5151521 is 1251515.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3474496 + 1677025 = 1864^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151521 - 2⁶ = 5151457 is a prime.

It is a super-2 number, since 2×5151521² = 53076337226882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5151493 and 5151502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5151541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2575760 + 2575761.

It is an arithmetic number, because the mean of its divisors is an integer number (2575761).

Almost surely, 2^5151521 is an apocalyptic number.

It is an amenable number.

5151521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5151521 is an equidigital number, since it uses as much as digits as its factorization.

5151521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250, while the sum is 20.

The square root of 5151521 is about 2269.6962351821. The cubic root of 5151521 is about 172.7077494176.

The spelling of 5151521 in words is "five million, one hundred fifty-one thousand, five hundred twenty-one".