51029369 has 4 divisors (see below), whose sum is σ = 51109620. Its totient is φ = 50949120.

The previous prime is 51029353. The next prime is 51029417. The reversal of 51029369 is 96392015.

51029369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42250000 + 8779369 = 6500^2 + 2963^2 .

It is a cyclic number.

It is not a de Polignac number, because 51029369 - 2⁴ = 51029353 is a prime.

It is a super-2 number, since 2×51029369² = 5207993001076322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51020369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39164 + ... + 40445.

It is an arithmetic number, because the mean of its divisors is an integer number (12777405).

Almost surely, 2^51029369 is an apocalyptic number.

It is an amenable number.

51029369 is a deficient number, since it is larger than the sum of its proper divisors (80251).

51029369 is an equidigital number, since it uses as much as digits as its factorization.

51029369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80250.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 51029369 is about 7143.4843738893. The cubic root of 51029369 is about 370.9141481516.

The spelling of 51029369 in words is "fifty-one million, twenty-nine thousand, three hundred sixty-nine".