51285013 has 8 divisors (see below), whose sum is σ = 55666688. Its totient is φ = 46965744.

The previous prime is 51285011. The next prime is 51285019. The reversal of 51285013 is 31058215.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51285013 - 2¹ = 51285011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51285011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13881 + ... + 17182.

It is an arithmetic number, because the mean of its divisors is an integer number (6958336).

Almost surely, 2^51285013 is an apocalyptic number.

It is an amenable number.

51285013 is a deficient number, since it is larger than the sum of its proper divisors (4381675).

51285013 is a wasteful number, since it uses less digits than its factorization.

51285013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31203.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 51285013 is about 7161.3555281106. The cubic root of 51285013 is about 371.5325114786.

The spelling of 51285013 in words is "fifty-one million, two hundred eighty-five thousand, thirteen".