51632136 has 24 divisors (see below), whose sum is σ = 139837230. Its totient is φ = 17210688.

The previous prime is 51632117. The next prime is 51632137. The reversal of 51632136 is 63123615.

It can be written as a sum of positive squares in only one way, i.e., 47196900 + 4435236 = 6870^2 + 2106^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (51632137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 358485 + ... + 358628.

Almost surely, 2^51632136 is an apocalyptic number.

It is an amenable number.

51632136 is an abundant number, since it is smaller than the sum of its proper divisors (88205094).

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

51632136 is a wasteful number, since it uses less digits than its factorization.

51632136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717125 (or 717118 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 51632136 is about 7185.5505008315. The cubic root of 51632136 is about 372.3688675550.

The spelling of 51632136 in words is "fifty-one million, six hundred thirty-two thousand, one hundred thirty-six".