51636252 has 12 divisors (see below), whose sum is σ = 120484616. Its totient is φ = 17212080.

The previous prime is 51636251. The next prime is 51636329. The reversal of 51636252 is 25263615.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51636251) 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, 2151499 + ... + 2151522.

Almost surely, 2^51636252 is an apocalyptic number.

It is an amenable number.

51636252 is an abundant number, since it is smaller than the sum of its proper divisors (68848364).

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

51636252 is a wasteful number, since it uses less digits than its factorization.

51636252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303028 (or 4303026 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 51636252 is about 7185.8369032424. The cubic root of 51636252 is about 372.3787621004.

Adding to 51636252 its reverse (25263615), we get a palindrome (76899867).

The spelling of 51636252 in words is "fifty-one million, six hundred thirty-six thousand, two hundred fifty-two".