51656514 has 64 divisors (see below), whose sum is σ = 130642176. Its totient is φ = 13250304.

The previous prime is 51656491. The next prime is 51656519. The reversal of 51656514 is 41565615.

It is not an unprimeable number, because it can be changed into a prime (51656519) 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 31 ways as a sum of consecutive naturals, for example, 18924 + ... + 21480.

It is an arithmetic number, because the mean of its divisors is an integer number (2041284).

Almost surely, 2^51656514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51656514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65321088).

51656514 is an abundant number, since it is smaller than the sum of its proper divisors (78985662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51656514 is a wasteful number, since it uses less digits than its factorization.

51656514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619.

The product of its digits is 18000, while the sum is 33.

The square root of 51656514 is about 7187.2466216208. The cubic root of 51656514 is about 372.4274627160.

The spelling of 51656514 in words is "fifty-one million, six hundred fifty-six thousand, five hundred fourteen".