51664303 has 4 divisors (see below), whose sum is σ = 52435480. Its totient is φ = 50893128.

The previous prime is 51664273. The next prime is 51664331. The reversal of 51664303 is 30346615.

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 51664303 - 2⁵ = 51664271 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 (51664373) 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, 385488 + ... + 385621.

It is an arithmetic number, because the mean of its divisors is an integer number (13108870).

Almost surely, 2^51664303 is an apocalyptic number.

51664303 is a deficient number, since it is larger than the sum of its proper divisors (771177).

51664303 is an equidigital number, since it uses as much as digits as its factorization.

51664303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771176.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 51664303 is about 7187.7884637766. The cubic root of 51664303 is about 372.4461805343.

The spelling of 51664303 in words is "fifty-one million, six hundred sixty-four thousand, three hundred three".