51611601 has 8 divisors (see below), whose sum is σ = 68929120. Its totient is φ = 34350912.

The previous prime is 51611591. The next prime is 51611611. The reversal of 51611601 is 10611615.

51611601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51611591) and next prime (51611611).

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

It is not a de Polignac number, because 51611601 - 2⁶ = 51611537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51611611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12040 + ... + 15753.

It is an arithmetic number, because the mean of its divisors is an integer number (8616140).

Almost surely, 2^51611601 is an apocalyptic number.

It is an amenable number.

51611601 is a deficient number, since it is larger than the sum of its proper divisors (17317519).

51611601 is a wasteful number, since it uses less digits than its factorization.

51611601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28415.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 51611601 is about 7184.1214494189. The cubic root of 51611601 is about 372.3194951471.

The spelling of 51611601 in words is "fifty-one million, six hundred eleven thousand, six hundred one".