51601289 has 2 divisors, whose sum is σ = 51601290. Its totient is φ = 51601288.

The previous prime is 51601271. The next prime is 51601313. The reversal of 51601289 is 98210615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37613689 + 13987600 = 6133^2 + 3740^2 .

It is a cyclic number.

It is not a de Polignac number, because 51601289 - 2¹⁶ = 51535753 is a prime.

It is not a weakly prime, because it can be changed into another prime (51601219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25800644 + 25800645.

It is an arithmetic number, because the mean of its divisors is an integer number (25800645).

Almost surely, 2^51601289 is an apocalyptic number.

It is an amenable number.

51601289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51601289 is an equidigital number, since it uses as much as digits as its factorization.

51601289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 51601289 is about 7183.4037196861. The cubic root of 51601289 is about 372.2946970119.

The spelling of 51601289 in words is "fifty-one million, six hundred one thousand, two hundred eighty-nine".