51316250 has 40 divisors (see below), whose sum is σ = 97909284. Its totient is φ = 20160000.

The previous prime is 51316241. The next prime is 51316259. The reversal of 51316250 is 5261315.

It is an interprime number because it is at equal distance from previous prime (51316241) and next prime (51316259).

It can be written as a sum of positive squares in 10 ways, for example, as 19989841 + 31326409 = 4471^2 + 5597^2 .

It is not an unprimeable number, because it can be changed into a prime (51316259) 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 19 ways as a sum of consecutive naturals, for example, 75914 + ... + 76586.

Almost surely, 2^51316250 is an apocalyptic number.

51316250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51316250 is a deficient number, since it is larger than the sum of its proper divisors (46593034).

51316250 is an equidigital number, since it uses as much as digits as its factorization.

51316250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51316250 is about 7163.5361379699. The cubic root of 51316250 is about 371.6079279594.

Adding to 51316250 its reverse (5261315), we get a palindrome (56577565).

The spelling of 51316250 in words is "fifty-one million, three hundred sixteen thousand, two hundred fifty".