51069 has 8 divisors (see below), whose sum is σ = 70560. Its totient is φ = 32816.

The previous prime is 51061. The next prime is 51071. The reversal of 51069 is 96015.

51069 = T₁₀₂ + T₁₀₃ + ... + T₁₁₀.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51069 - 2³ = 51061 is a prime.

It is a super-2 number, since 2×51069² = 5216085522, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207 + ... + 380.

It is an arithmetic number, because the mean of its divisors is an integer number (8820).

2⁵¹⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

51069 is a deficient number, since it is larger than the sum of its proper divisors (19491).

51069 is a wasteful number, since it uses less digits than its factorization.

51069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 51069 is about 225.9845127437. The cubic root of 51069 is about 37.1010144471.

It can be divided in two parts, 5106 and 9, that multiplied together give a palindrome (45954).

The spelling of 51069 in words is "fifty-one thousand, sixty-nine".