51396617 has 2 divisors, whose sum is σ = 51396618. Its totient is φ = 51396616.

The previous prime is 51396607. The next prime is 51396629. The reversal of 51396617 is 71669315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44342281 + 7054336 = 6659^2 + 2656^2 .

It is a cyclic number.

It is not a de Polignac number, because 51396617 - 2¹⁴ = 51380233 is a prime.

It is a super-2 number, since 2×51396617² = 5283224478089378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51396607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25698308 + 25698309.

It is an arithmetic number, because the mean of its divisors is an integer number (25698309).

Almost surely, 2^51396617 is an apocalyptic number.

It is an amenable number.

51396617 is a deficient number, since it is larger than the sum of its proper divisors (1).

51396617 is an equidigital number, since it uses as much as digits as its factorization.

51396617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 51396617 is about 7169.1433937396. The cubic root of 51396617 is about 371.8018199997.

The spelling of 51396617 in words is "fifty-one million, three hundred ninety-six thousand, six hundred seventeen".