51320353 has 4 divisors (see below), whose sum is σ = 58651840. Its totient is φ = 43988868.

The previous prime is 51320351. The next prime is 51320359. The reversal of 51320353 is 35302315.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35302315 = 5 ⋅7060463.

It is not a de Polignac number, because 51320353 - 2¹ = 51320351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51320351) 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 3 ways as a sum of consecutive naturals, for example, 3665733 + ... + 3665746.

It is an arithmetic number, because the mean of its divisors is an integer number (14662960).

Almost surely, 2^51320353 is an apocalyptic number.

It is an amenable number.

51320353 is a deficient number, since it is larger than the sum of its proper divisors (7331487).

51320353 is an equidigital number, since it uses as much as digits as its factorization.

51320353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331486.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 51320353 is about 7163.8225131559. The cubic root of 51320353 is about 371.6178316884.

Adding to 51320353 its reverse (35302315), we get a palindrome (86622668).

The spelling of 51320353 in words is "fifty-one million, three hundred twenty thousand, three hundred fifty-three".