51857632 has 12 divisors (see below), whose sum is σ = 102094776. Its totient is φ = 25928800.

The previous prime is 51857629. The next prime is 51857639. The reversal of 51857632 is 23675815.

It is a junction number, because it is equal to n+sod(n) for n = 51857591 and 51857600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51857639) by changing a digit.

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 as a sum of consecutive naturals, namely, 810244 + ... + 810307.

It is an arithmetic number, because the mean of its divisors is an integer number (8507898).

Almost surely, 2^51857632 is an apocalyptic number.

It is an amenable number.

51857632 is a deficient number, since it is larger than the sum of its proper divisors (50237144).

51857632 is a wasteful number, since it uses less digits than its factorization.

51857632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620561 (or 1620553 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 51857632 is about 7201.2243403466. The cubic root of 51857632 is about 372.9101696290.

The spelling of 51857632 in words is "fifty-one million, eight hundred fifty-seven thousand, six hundred thirty-two".