51047655 has 8 divisors (see below), whose sum is σ = 81676272. Its totient is φ = 27225408.

The previous prime is 51047609. The next prime is 51047663. The reversal of 51047655 is 55674015.

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

It is not a de Polignac number, because 51047655 - 2⁷ = 51047527 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1701574 + ... + 1701603.

It is an arithmetic number, because the mean of its divisors is an integer number (10209534).

Almost surely, 2^51047655 is an apocalyptic number.

51047655 is a deficient number, since it is larger than the sum of its proper divisors (30628617).

51047655 is a wasteful number, since it uses less digits than its factorization.

51047655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403185.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 51047655 is about 7144.7641668567. The cubic root of 51047655 is about 370.9584476485.

The spelling of 51047655 in words is "fifty-one million, forty-seven thousand, six hundred fifty-five".