51330069 has 12 divisors (see below), whose sum is σ = 84735456. Its totient is φ = 29331432.

The previous prime is 51330061. The next prime is 51330101. The reversal of 51330069 is 96003315.

51330069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51330069 - 2³ = 51330061 is a prime.

It is a super-2 number, since 2×51330069² = 5269551967089522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51330061) 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 11 ways as a sum of consecutive naturals, for example, 407319 + ... + 407444.

It is an arithmetic number, because the mean of its divisors is an integer number (7061288).

Almost surely, 2^51330069 is an apocalyptic number.

It is an amenable number.

51330069 is a deficient number, since it is larger than the sum of its proper divisors (33405387).

51330069 is a wasteful number, since it uses less digits than its factorization.

51330069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814776 (or 814773 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 51330069 is about 7164.5006106497. The cubic root of 51330069 is about 371.6412818455.

The spelling of 51330069 in words is "fifty-one million, three hundred thirty thousand, sixty-nine".