471865821 has 16 divisors (see below), whose sum is σ = 761330304. Its totient is φ = 253776384.

The previous prime is 471865813. The next prime is 471865831. The reversal of 471865821 is 128568174.

It is not a de Polignac number, because 471865821 - 2³ = 471865813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (471865811) 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 15 ways as a sum of consecutive naturals, for example, 660520 + ... + 661233.

It is an arithmetic number, because the mean of its divisors is an integer number (47583144).

Almost surely, 2^471865821 is an apocalyptic number.

It is an amenable number.

471865821 is a deficient number, since it is larger than the sum of its proper divisors (289464483).

471865821 is a wasteful number, since it uses less digits than its factorization.

471865821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321780.

The product of its digits is 107520, while the sum is 42.

The square root of 471865821 is about 21722.4727183624. The cubic root of 471865821 is about 778.5254967520.

The spelling of 471865821 in words is "four hundred seventy-one million, eight hundred sixty-five thousand, eight hundred twenty-one".