51284613 has 8 divisors (see below), whose sum is σ = 68423488. Its totient is φ = 34167744.

The previous prime is 51284603. The next prime is 51284647. The reversal of 51284613 is 31648215.

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

It is not a de Polignac number, because 51284613 - 2²¹ = 49187461 is a prime.

It is a super-2 number, since 2×51284613² = 5260223061119538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51284603) 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, 1056 + ... + 10182.

It is an arithmetic number, because the mean of its divisors is an integer number (8552936).

Almost surely, 2^51284613 is an apocalyptic number.

It is an amenable number.

51284613 is a deficient number, since it is larger than the sum of its proper divisors (17138875).

51284613 is a wasteful number, since it uses less digits than its factorization.

51284613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11003.

The product of its digits is 5760, while the sum is 30.

The square root of 51284613 is about 7161.3276003825. The cubic root of 51284613 is about 371.5315455474.

The spelling of 51284613 in words is "fifty-one million, two hundred eighty-four thousand, six hundred thirteen".