51805029 has 4 divisors (see below), whose sum is σ = 69073376. Its totient is φ = 34536684.

The previous prime is 51804997. The next prime is 51805051. The reversal of 51805029 is 92050815.

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 not a de Polignac number, because 51805029 - 2⁵ = 51804997 is a prime.

It is a super-2 number, since 2×51805029² = 5367522059381682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51804987 and 51805005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51825029) 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, 8634169 + ... + 8634174.

It is an arithmetic number, because the mean of its divisors is an integer number (17268344).

Almost surely, 2^51805029 is an apocalyptic number.

It is an amenable number.

51805029 is a deficient number, since it is larger than the sum of its proper divisors (17268347).

51805029 is a wasteful number, since it uses less digits than its factorization.

51805029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17268346.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 51805029 is about 7197.5710486247. The cubic root of 51805029 is about 372.7840369246.

The spelling of 51805029 in words is "fifty-one million, eight hundred five thousand, twenty-nine".