51608659 has 4 divisors (see below), whose sum is σ = 51664104. Its totient is φ = 51553216.

The previous prime is 51608621. The next prime is 51608663. The reversal of 51608659 is 95680615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51608659 - 2¹³ = 51600467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51608699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26302 + ... + 28195.

It is an arithmetic number, because the mean of its divisors is an integer number (12916026).

Almost surely, 2^51608659 is an apocalyptic number.

51608659 is a deficient number, since it is larger than the sum of its proper divisors (55445).

51608659 is an equidigital number, since it uses as much as digits as its factorization.

51608659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55444.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 51608659 is about 7183.9166893833. The cubic root of 51608659 is about 372.3124206086.

The spelling of 51608659 in words is "fifty-one million, six hundred eight thousand, six hundred fifty-nine".