51605119 has 4 divisors (see below), whose sum is σ = 51821280. Its totient is φ = 51388960.

The previous prime is 51605063. The next prime is 51605131. The reversal of 51605119 is 91150615.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51605119 is a prime.

It is a super-2 number, since 2×51605119² = 5326176614008322, 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 (51605189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107722 + ... + 108199.

It is an arithmetic number, because the mean of its divisors is an integer number (12955320).

Almost surely, 2^51605119 is an apocalyptic number.

51605119 is a deficient number, since it is larger than the sum of its proper divisors (216161).

51605119 is a wasteful number, since it uses less digits than its factorization.

51605119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216160.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 51605119 is about 7183.6703014545. The cubic root of 51605119 is about 372.3039077212.

The spelling of 51605119 in words is "fifty-one million, six hundred five thousand, one hundred nineteen".