51515330 has 8 divisors (see below), whose sum is σ = 92727612. Its totient is φ = 20606128.

The previous prime is 51515291. The next prime is 51515351. The reversal of 51515330 is 3351515.

It can be written as a sum of positive squares in 2 ways, for example, as 51222649 + 292681 = 7157^2 + 541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51515296 and 51515305.

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 in 3 ways as a sum of consecutive naturals, for example, 2575757 + ... + 2575776.

Almost surely, 2^51515330 is an apocalyptic number.

51515330 is a deficient number, since it is larger than the sum of its proper divisors (41212282).

51515330 is a wasteful number, since it uses less digits than its factorization.

51515330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5151540.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 51515330 is about 7177.4180594417. The cubic root of 51515330 is about 372.0878554972.

Adding to 51515330 its reverse (3351515), we get a palindrome (54866845).

The spelling of 51515330 in words is "fifty-one million, five hundred fifteen thousand, three hundred thirty".