51606005 has 16 divisors (see below), whose sum is σ = 67863744. Its totient is φ = 37361280.

The previous prime is 51605989. The next prime is 51606007. The reversal of 51606005 is 50060615.

It is not a de Polignac number, because 51606005 - 2⁴ = 51605989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51606007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10802 + ... + 14828.

It is an arithmetic number, because the mean of its divisors is an integer number (4241484).

Almost surely, 2^51606005 is an apocalyptic number.

51606005 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51606005 is a deficient number, since it is larger than the sum of its proper divisors (16257739).

51606005 is a wasteful number, since it uses less digits than its factorization.

51606005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51606005 is about 7183.7319688307. The cubic root of 51606005 is about 372.3060383844.

The spelling of 51606005 in words is "fifty-one million, six hundred six thousand, five".