51662736 has 30 divisors (see below), whose sum is σ = 144584310. Its totient is φ = 17220864.

The previous prime is 51662731. The next prime is 51662749. The reversal of 51662736 is 63726615.

It can be written as a sum of positive squares in only one way, i.e., 30869136 + 20793600 = 5556^2 + 4560^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51662736.

It is not an unprimeable number, because it can be changed into a prime (51662731) 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 5 ways as a sum of consecutive naturals, for example, 179241 + ... + 179528.

It is an arithmetic number, because the mean of its divisors is an integer number (4819477).

Almost surely, 2^51662736 is an apocalyptic number.

It is an amenable number.

51662736 is an abundant number, since it is smaller than the sum of its proper divisors (92921574).

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

51662736 is a wasteful number, since it uses less digits than its factorization.

51662736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358783 (or 358774 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 51662736 is about 7187.6794586292. The cubic root of 51662736 is about 372.4424150132.

The spelling of 51662736 in words is "fifty-one million, six hundred sixty-two thousand, seven hundred thirty-six".