51353869 has 4 divisors (see below), whose sum is σ = 58690144. Its totient is φ = 44017596.

The previous prime is 51353833. The next prime is 51353881. The reversal of 51353869 is 96835315.

51353869 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51353869 - 2¹¹ = 51351821 is a prime.

It is a super-2 number, since 2×51353869² = 5274439722538322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51353569) 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, 3668127 + ... + 3668140.

It is an arithmetic number, because the mean of its divisors is an integer number (14672536).

Almost surely, 2^51353869 is an apocalyptic number.

It is an amenable number.

51353869 is a deficient number, since it is larger than the sum of its proper divisors (7336275).

51353869 is an equidigital number, since it uses as much as digits as its factorization.

51353869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7336274.

The product of its digits is 97200, while the sum is 40.

The square root of 51353869 is about 7166.1613852885. The cubic root of 51353869 is about 371.6987120937.

The spelling of 51353869 in words is "fifty-one million, three hundred fifty-three thousand, eight hundred sixty-nine".