51440303 has 2 divisors, whose sum is σ = 51440304. Its totient is φ = 51440302.

The previous prime is 51440299. The next prime is 51440327. The reversal of 51440303 is 30304415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51440303 - 2² = 51440299 is a prime.

It is a super-2 number, since 2×51440303² = 5292209545463618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51440383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25720151 + 25720152.

It is an arithmetic number, because the mean of its divisors is an integer number (25720152).

Almost surely, 2^51440303 is an apocalyptic number.

51440303 is a deficient number, since it is larger than the sum of its proper divisors (1).

51440303 is an equidigital number, since it uses as much as digits as its factorization.

51440303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 51440303 is about 7172.1895541041. The cubic root of 51440303 is about 371.9071313055.

Adding to 51440303 its reverse (30304415), we get a palindrome (81744718).

The spelling of 51440303 in words is "fifty-one million, four hundred forty thousand, three hundred three".