51515108 has 6 divisors (see below), whose sum is σ = 90151446. Its totient is φ = 25757552.

The previous prime is 51515081. The next prime is 51515129. The reversal of 51515108 is 80151515.

It can be written as a sum of positive squares in only one way, i.e., 51008164 + 506944 = 7142^2 + 712^2 .

It is a super-3 number, since 3×51515108³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6439385 + ... + 6439392.

It is an arithmetic number, because the mean of its divisors is an integer number (15025241).

Almost surely, 2^51515108 is an apocalyptic number.

It is an amenable number.

51515108 is a deficient number, since it is larger than the sum of its proper divisors (38636338).

51515108 is a wasteful number, since it uses less digits than its factorization.

51515108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12878781 (or 12878779 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 26.

The square root of 51515108 is about 7177.4025942537. The cubic root of 51515108 is about 372.0873210050.

The spelling of 51515108 in words is "fifty-one million, five hundred fifteen thousand, one hundred eight".