51032540 has 24 divisors (see below), whose sum is σ = 115412640. Its totient is φ = 18842688.

The previous prime is 51032533. The next prime is 51032543. The reversal of 51032540 is 4523015.

51032540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51032543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97880 + ... + 98399.

It is an arithmetic number, because the mean of its divisors is an integer number (4808860).

Almost surely, 2^51032540 is an apocalyptic number.

It is an amenable number.

51032540 is an abundant number, since it is smaller than the sum of its proper divisors (64380100).

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

51032540 is a wasteful number, since it uses less digits than its factorization.

51032540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196301 (or 196299 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51032540 is about 7143.7063209513. The cubic root of 51032540 is about 370.9218309457.

Adding to 51032540 its reverse (4523015), we get a palindrome (55555555).

The spelling of 51032540 in words is "fifty-one million, thirty-two thousand, five hundred forty".