51201250 has 20 divisors (see below), whose sum is σ = 95973966. Its totient is φ = 20480000.

The previous prime is 51201247. The next prime is 51201259. The reversal of 51201250 is 5210215.

It can be written as a sum of positive squares in 5 ways, for example, as 5948721 + 45252529 = 2439^2 + 6727^2 .

It is not an unprimeable number, because it can be changed into a prime (51201259) 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 9 ways as a sum of consecutive naturals, for example, 19231 + ... + 21730.

Almost surely, 2^51201250 is an apocalyptic number.

51201250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51201250 is a deficient number, since it is larger than the sum of its proper divisors (44772716).

51201250 is an equidigital number, since it uses as much as digits as its factorization.

51201250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40983 (or 40968 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51201250 is about 7155.5048738716. The cubic root of 51201250 is about 371.3301285322.

Adding to 51201250 its reverse (5210215), we get a palindrome (56411465).

The spelling of 51201250 in words is "fifty-one million, two hundred one thousand, two hundred fifty".