51636061 has 4 divisors (see below), whose sum is σ = 51652800. Its totient is φ = 51619324.

The previous prime is 51636023. The next prime is 51636121. The reversal of 51636061 is 16063615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16063615 = 5 ⋅3212723.

It is a cyclic number.

It is not a de Polignac number, because 51636061 - 2¹³ = 51627869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51636001) 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, 2251 + ... + 10408.

It is an arithmetic number, because the mean of its divisors is an integer number (12913200).

Almost surely, 2^51636061 is an apocalyptic number.

It is an amenable number.

51636061 is a deficient number, since it is larger than the sum of its proper divisors (16739).

51636061 is a wasteful number, since it uses less digits than its factorization.

51636061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16738.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 51636061 is about 7185.8236131984. The cubic root of 51636061 is about 372.3783029628.

Adding to 51636061 its reverse (16063615), we get a palindrome (67699676).

The spelling of 51636061 in words is "fifty-one million, six hundred thirty-six thousand, sixty-one".