51608269 has 4 divisors (see below), whose sum is σ = 51757344. Its totient is φ = 51459196.

The previous prime is 51608261. The next prime is 51608281. The reversal of 51608269 is 96280615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51608269 - 2³ = 51608261 is a prime.

It is a super-2 number, since 2×51608269² = 5326826858352722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51608261) 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, 74017 + ... + 74710.

It is an arithmetic number, because the mean of its divisors is an integer number (12939336).

Almost surely, 2^51608269 is an apocalyptic number.

It is an amenable number.

51608269 is a deficient number, since it is larger than the sum of its proper divisors (149075).

51608269 is a wasteful number, since it uses less digits than its factorization.

51608269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149074.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 51608269 is about 7183.8895453647. The cubic root of 51608269 is about 372.3114827672.

The spelling of 51608269 in words is "fifty-one million, six hundred eight thousand, two hundred sixty-nine".