51515050 has 24 divisors (see below), whose sum is σ = 96776172. Its totient is φ = 20402000.

The previous prime is 51515047. The next prime is 51515053. The reversal of 51515050 is 5051515.

It is an interprime number because it is at equal distance from previous prime (51515047) and next prime (51515053).

It can be written as a sum of positive squares in 6 ways, for example, as 42133081 + 9381969 = 6491^2 + 3063^2 .

It is not an unprimeable number, because it can be changed into a prime (51515053) 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 11 ways as a sum of consecutive naturals, for example, 510000 + ... + 510100.

Almost surely, 2^51515050 is an apocalyptic number.

51515050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51515050 is a deficient number, since it is larger than the sum of its proper divisors (45261122).

51515050 is an frugal number, since it uses more digits than its factorization.

51515050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 51515050 is about 7177.3985537937. The cubic root of 51515050 is about 372.0871813627.

Adding to 51515050 its reverse (5051515), we get a palindrome (56566565).

It can be divided in two parts, 5151 and 5050, that added together give a palindrome (10201).

The spelling of 51515050 in words is "fifty-one million, five hundred fifteen thousand, fifty".