51636533 has 16 divisors (see below), whose sum is σ = 56878080. Its totient is φ = 46590336.

The previous prime is 51636527. The next prime is 51636539. The reversal of 51636533 is 33563615.

It is an interprime number because it is at equal distance from previous prime (51636527) and next prime (51636539).

It is not a de Polignac number, because 51636533 - 2⁴ = 51636517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51636533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51636539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140516 + ... + 140882.

It is an arithmetic number, because the mean of its divisors is an integer number (3554880).

Almost surely, 2^51636533 is an apocalyptic number.

It is an amenable number.

51636533 is a deficient number, since it is larger than the sum of its proper divisors (5241547).

51636533 is a wasteful number, since it uses less digits than its factorization.

51636533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its digits is 24300, while the sum is 32.

The square root of 51636533 is about 7185.8564555660. The cubic root of 51636533 is about 372.3794375834.

The spelling of 51636533 in words is "fifty-one million, six hundred thirty-six thousand, five hundred thirty-three".