51320303 has 4 divisors (see below), whose sum is σ = 51800040. Its totient is φ = 50840568.

The previous prime is 51320299. The next prime is 51320323. The reversal of 51320303 is 30302315.

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

It is a cyclic number.

It is not a de Polignac number, because 51320303 - 2² = 51320299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51320323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239708 + ... + 239921.

It is an arithmetic number, because the mean of its divisors is an integer number (12950010).

Almost surely, 2^51320303 is an apocalyptic number.

51320303 is a deficient number, since it is larger than the sum of its proper divisors (479737).

51320303 is a wasteful number, since it uses less digits than its factorization.

51320303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479736.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 51320303 is about 7163.8190233981. The cubic root of 51320303 is about 371.6177110027.

Adding to 51320303 its reverse (30302315), we get a palindrome (81622618).

The spelling of 51320303 in words is "fifty-one million, three hundred twenty thousand, three hundred three".