51735636 has 18 divisors (see below), whose sum is σ = 130776282. Its totient is φ = 17245200.

The previous prime is 51735589. The next prime is 51735653. The reversal of 51735636 is 63653715.

It is a happy number.

51735636 is a `hidden beast` number, since 5 + 17 + 3 + 5 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42771600 + 8964036 = 6540^2 + 2994^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1437101 = 51735636 / (5 + 1 + 7 + 3 + 5 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 51735636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 718515 + ... + 718586.

It is an arithmetic number, because the mean of its divisors is an integer number (7265349).

Almost surely, 2^51735636 is an apocalyptic number.

It is an amenable number.

51735636 is an abundant number, since it is smaller than the sum of its proper divisors (79040646).

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

51735636 is a wasteful number, since it uses less digits than its factorization.

51735636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437111 (or 1437106 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 51735636 is about 7192.7488486670. The cubic root of 51735636 is about 372.6175140848.

The spelling of 51735636 in words is "fifty-one million, seven hundred thirty-five thousand, six hundred thirty-six".