51264985 has 8 divisors (see below), whose sum is σ = 62152776. Its totient is φ = 40588800.

The previous prime is 51264971. The next prime is 51265001. The reversal of 51264985 is 58946215.

It can be written as a sum of positive squares in 4 ways, for example, as 741321 + 50523664 = 861^2 + 7108^2 .

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

It is not a de Polignac number, because 51264985 - 2¹⁵ = 51232217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52366 + ... + 53335.

It is an arithmetic number, because the mean of its divisors is an integer number (7769097).

Almost surely, 2^51264985 is an apocalyptic number.

It is an amenable number.

51264985 is a deficient number, since it is larger than the sum of its proper divisors (10887791).

51264985 is a wasteful number, since it uses less digits than its factorization.

51264985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105803.

The product of its digits is 86400, while the sum is 40.

The square root of 51264985 is about 7159.9570529438. The cubic root of 51264985 is about 371.4841411293.

The spelling of 51264985 in words is "fifty-one million, two hundred sixty-four thousand, nine hundred eighty-five".