51651164 has 12 divisors (see below), whose sum is σ = 90594000. Its totient is φ = 25767168.

The previous prime is 51651161. The next prime is 51651181. The reversal of 51651164 is 46115615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12584 + ... + 16175.

It is an arithmetic number, because the mean of its divisors is an integer number (7549500).

Almost surely, 2^51651164 is an apocalyptic number.

It is an amenable number.

51651164 is a deficient number, since it is larger than the sum of its proper divisors (38942836).

51651164 is a wasteful number, since it uses less digits than its factorization.

51651164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29212 (or 29210 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 51651164 is about 7186.8744249500. The cubic root of 51651164 is about 372.4146049913.

Adding to 51651164 its reverse (46115615), we get a palindrome (97766779).

It can be divided in two parts, 51651 and 164, that added together give a palindrome (51815).

The spelling of 51651164 in words is "fifty-one million, six hundred fifty-one thousand, one hundred sixty-four".