51487855 has 8 divisors (see below), whose sum is σ = 62568000. Its totient is φ = 40668576.

The previous prime is 51487837. The next prime is 51487859. The reversal of 51487855 is 55878415.

51487855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51487855 - 2⁹ = 51487343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51487859) 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, 64780 + ... + 65569.

It is an arithmetic number, because the mean of its divisors is an integer number (7821000).

Almost surely, 2^51487855 is an apocalyptic number.

51487855 is a deficient number, since it is larger than the sum of its proper divisors (11080145).

51487855 is a wasteful number, since it uses less digits than its factorization.

51487855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130433.

The product of its digits is 224000, while the sum is 43.

The square root of 51487855 is about 7175.5038150641. The cubic root of 51487855 is about 372.0216944029.

The spelling of 51487855 in words is "fifty-one million, four hundred eighty-seven thousand, eight hundred fifty-five".