51732540 has 48 divisors (see below), whose sum is σ = 160947360. Its totient is φ = 13795200.

The previous prime is 51732523. The next prime is 51732553. The reversal of 51732540 is 4523715.

It is a happy number.

51732540 is a `hidden beast` number, since 51 + 73 + 2 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 47361 + ... + 48440.

It is an arithmetic number, because the mean of its divisors is an integer number (3353070).

Almost surely, 2^51732540 is an apocalyptic number.

It is an amenable number.

51732540 is an abundant number, since it is smaller than the sum of its proper divisors (109214820).

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

51732540 is a wasteful number, since it uses less digits than its factorization.

51732540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95819 (or 95811 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 51732540 is about 7192.5336287014. The cubic root of 51732540 is about 372.6100811242.

The spelling of 51732540 in words is "fifty-one million, seven hundred thirty-two thousand, five hundred forty".