51005611 has 8 divisors (see below), whose sum is σ = 52910000. Its totient is φ = 49133952.

The previous prime is 51005597. The next prime is 51005621. The reversal of 51005611 is 11650015.

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 51005611 - 2⁵ = 51005579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51005621) 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, 4986 + ... + 11263.

It is an arithmetic number, because the mean of its divisors is an integer number (6613750).

Almost surely, 2^51005611 is an apocalyptic number.

51005611 is a deficient number, since it is larger than the sum of its proper divisors (1904389).

51005611 is a wasteful number, since it uses less digits than its factorization.

51005611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16365.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 51005611 is about 7141.8212663158. The cubic root of 51005611 is about 370.8565764275.

Adding to 51005611 its reverse (11650015), we get a palindrome (62655626).

The spelling of 51005611 in words is "fifty-one million, five thousand, six hundred eleven".