51609617 has 2 divisors, whose sum is σ = 51609618. Its totient is φ = 51609616.

The previous prime is 51609541. The next prime is 51609629. The reversal of 51609617 is 71690615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49547521 + 2062096 = 7039^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 51609617 - 2⁸ = 51609361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51609667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25804808 + 25804809.

It is an arithmetic number, because the mean of its divisors is an integer number (25804809).

Almost surely, 2^51609617 is an apocalyptic number.

It is an amenable number.

51609617 is a deficient number, since it is larger than the sum of its proper divisors (1).

51609617 is an equidigital number, since it uses as much as digits as its factorization.

51609617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 51609617 is about 7183.9833657937. The cubic root of 51609617 is about 372.3147243118.

The spelling of 51609617 in words is "fifty-one million, six hundred nine thousand, six hundred seventeen".