51515135 has 16 divisors (see below), whose sum is σ = 70963776. Its totient is φ = 35167488.

The previous prime is 51515129. The next prime is 51515159. The reversal of 51515135 is 53151515.

It is a cyclic number.

It is not a de Polignac number, because 51515135 - 2⁶ = 51515071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4997 + ... + 11313.

It is an arithmetic number, because the mean of its divisors is an integer number (4435236).

Almost surely, 2^51515135 is an apocalyptic number.

51515135 is a deficient number, since it is larger than the sum of its proper divisors (19448641).

51515135 is a wasteful number, since it uses less digits than its factorization.

51515135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6562.

The product of its digits is 1875, while the sum is 26.

The square root of 51515135 is about 7177.4044751567. The cubic root of 51515135 is about 372.0873860109.

The spelling of 51515135 in words is "fifty-one million, five hundred fifteen thousand, one hundred thirty-five".