51515102 has 16 divisors (see below), whose sum is σ = 79140672. Its totient is φ = 25138080.

The previous prime is 51515081. The next prime is 51515129. The reversal of 51515102 is 20151515.

It is a happy number.

51515102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50348 + ... + 51360.

It is an arithmetic number, because the mean of its divisors is an integer number (4946292).

Almost surely, 2^51515102 is an apocalyptic number.

51515102 is a deficient number, since it is larger than the sum of its proper divisors (27625570).

51515102 is a wasteful number, since it uses less digits than its factorization.

51515102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 51515102 is about 7177.4021762752. The cubic root of 51515102 is about 372.0873065593.

Adding to 51515102 its reverse (20151515), we get a palindrome (71666617).

The spelling of 51515102 in words is "fifty-one million, five hundred fifteen thousand, one hundred two".