51606164 has 6 divisors (see below), whose sum is σ = 90310794. Its totient is φ = 25803080.

The previous prime is 51606161. The next prime is 51606199. The reversal of 51606164 is 46160615.

It can be written as a sum of positive squares in only one way, i.e., 49589764 + 2016400 = 7042^2 + 1420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51606161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450767 + ... + 6450774.

It is an arithmetic number, because the mean of its divisors is an integer number (15051799).

Almost surely, 2^51606164 is an apocalyptic number.

It is an amenable number.

51606164 is a deficient number, since it is larger than the sum of its proper divisors (38704630).

51606164 is a wasteful number, since it uses less digits than its factorization.

51606164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901545 (or 12901543 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 51606164 is about 7183.7430354934. The cubic root of 51606164 is about 372.3064207468.

Adding to 51606164 its reverse (46160615), we get a palindrome (97766779).

The spelling of 51606164 in words is "fifty-one million, six hundred six thousand, one hundred sixty-four".