51533769 has 16 divisors (see below), whose sum is σ = 78634368. Its totient is φ = 29407872.

The previous prime is 51533743. The next prime is 51533789. The reversal of 51533769 is 96733515.

51533769 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 51533769 - 2⁷ = 51533641 is a prime.

It is a super-2 number, since 2×51533769² = 5311458694690722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51533789) 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 15 ways as a sum of consecutive naturals, for example, 21919 + ... + 24155.

It is an arithmetic number, because the mean of its divisors is an integer number (4914648).

Almost surely, 2^51533769 is an apocalyptic number.

It is an amenable number.

51533769 is a deficient number, since it is larger than the sum of its proper divisors (27100599).

51533769 is a wasteful number, since it uses less digits than its factorization.

51533769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344.

The product of its digits is 85050, while the sum is 39.

The square root of 51533769 is about 7178.7024593585. The cubic root of 51533769 is about 372.1322442875.

The spelling of 51533769 in words is "fifty-one million, five hundred thirty-three thousand, seven hundred sixty-nine".