51471555 has 8 divisors (see below), whose sum is σ = 82354512. Its totient is φ = 27451488.

The previous prime is 51471547. The next prime is 51471557. The reversal of 51471555 is 55517415.

It is a happy number.

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

It is not a de Polignac number, because 51471555 - 2³ = 51471547 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51471557) 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 in 7 ways as a sum of consecutive naturals, for example, 1715704 + ... + 1715733.

It is an arithmetic number, because the mean of its divisors is an integer number (10294314).

Almost surely, 2^51471555 is an apocalyptic number.

51471555 is a deficient number, since it is larger than the sum of its proper divisors (30882957).

51471555 is a wasteful number, since it uses less digits than its factorization.

51471555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431445.

The product of its digits is 17500, while the sum is 33.

The square root of 51471555 is about 7174.3679164091. The cubic root of 51471555 is about 371.9824321106.

The spelling of 51471555 in words is "fifty-one million, four hundred seventy-one thousand, five hundred fifty-five".