51609359 has 2 divisors, whose sum is σ = 51609360. Its totient is φ = 51609358.

The previous prime is 51609353. The next prime is 51609361. The reversal of 51609359 is 95390615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51609359 - 2⁴ = 51609343 is a prime.

Together with 51609361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51609353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25804679 + 25804680.

It is an arithmetic number, because the mean of its divisors is an integer number (25804680).

Almost surely, 2^51609359 is an apocalyptic number.

51609359 is a deficient number, since it is larger than the sum of its proper divisors (1).

51609359 is an equidigital number, since it uses as much as digits as its factorization.

51609359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 51609359 is about 7183.9654091595. The cubic root of 51609359 is about 372.3141039018.

The spelling of 51609359 in words is "fifty-one million, six hundred nine thousand, three hundred fifty-nine".