47851665 has 8 divisors (see below), whose sum is σ = 76562688. Its totient is φ = 25520880.

The previous prime is 47851613. The next prime is 47851673. The reversal of 47851665 is 56615874.

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

It is not a de Polignac number, because 47851665 - 2¹⁷ = 47720593 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1595041 + ... + 1595070.

It is an arithmetic number, because the mean of its divisors is an integer number (9570336).

Almost surely, 2^47851665 is an apocalyptic number.

It is an amenable number.

47851665 is a deficient number, since it is larger than the sum of its proper divisors (28711023).

47851665 is a wasteful number, since it uses less digits than its factorization.

47851665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190119.

The product of its digits is 201600, while the sum is 42.

The square root of 47851665 is about 6917.4897903792. The cubic root of 47851665 is about 363.0493675695.

It can be divided in two parts, 47851 and 665, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 47851665 in words is "forty-seven million, eight hundred fifty-one thousand, six hundred sixty-five".