51006613 has 16 divisors (see below), whose sum is σ = 62601984. Its totient is φ = 40561920.

The previous prime is 51006611. The next prime is 51006623. The reversal of 51006613 is 31660015.

It is not a de Polignac number, because 51006613 - 2¹ = 51006611 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 (51006611) 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 15 ways as a sum of consecutive naturals, for example, 5431 + ... + 11467.

It is an arithmetic number, because the mean of its divisors is an integer number (3912624).

Almost surely, 2^51006613 is an apocalyptic number.

It is an amenable number.

51006613 is a deficient number, since it is larger than the sum of its proper divisors (11595371).

51006613 is a wasteful number, since it uses less digits than its factorization.

51006613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 51006613 is about 7141.8914161446. The cubic root of 51006613 is about 370.8590048914.

Adding to 51006613 its reverse (31660015), we get a palindrome (82666628).

The spelling of 51006613 in words is "fifty-one million, six thousand, six hundred thirteen".