51409432 has 16 divisors (see below), whose sum is σ = 96517800. Its totient is φ = 25671360.

The previous prime is 51409409. The next prime is 51409433. The reversal of 51409432 is 23490415.

It is a self number, because there is not a number n which added to its sum of digits gives 51409432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51409433) 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, 3132 + ... + 10612.

Almost surely, 2^51409432 is an apocalyptic number.

It is an amenable number.

51409432 is a deficient number, since it is larger than the sum of its proper divisors (45108368).

51409432 is a wasteful number, since it uses less digits than its factorization.

51409432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8346 (or 8342 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 51409432 is about 7170.0370989277. The cubic root of 51409432 is about 371.8327185599.

Adding to 51409432 its reverse (23490415), we get a palindrome (74899847).

The spelling of 51409432 in words is "fifty-one million, four hundred nine thousand, four hundred thirty-two".