51031632 has 20 divisors (see below), whose sum is σ = 131831840. Its totient is φ = 17010528.

The previous prime is 51031597. The next prime is 51031649. The reversal of 51031632 is 23613015.

It is a junction number, because it is equal to n+sod(n) for n = 51031599 and 51031608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531532 + ... + 531627.

It is an arithmetic number, because the mean of its divisors is an integer number (6591592).

Almost surely, 2^51031632 is an apocalyptic number.

It is an amenable number.

51031632 is an abundant number, since it is smaller than the sum of its proper divisors (80800208).

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

51031632 is a wasteful number, since it uses less digits than its factorization.

51031632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063170 (or 1063164 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 51031632 is about 7143.6427682241. The cubic root of 51031632 is about 370.9196310486.

Adding to 51031632 its reverse (23613015), we get a palindrome (74644647).

The spelling of 51031632 in words is "fifty-one million, thirty-one thousand, six hundred thirty-two".