47854821 has 12 divisors (see below), whose sum is σ = 74224032. Its totient is φ = 27345528.

The previous prime is 47854799. The next prime is 47854823. The reversal of 47854821 is 12845874.

It is a happy number.

It is not a de Polignac number, because 47854821 - 2⁶ = 47854757 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 47854821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47854823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162625 + ... + 162918.

It is an arithmetic number, because the mean of its divisors is an integer number (6185336).

Almost surely, 2^47854821 is an apocalyptic number.

It is an amenable number.

47854821 is a deficient number, since it is larger than the sum of its proper divisors (26369211).

47854821 is a wasteful number, since it uses less digits than its factorization.

47854821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325560 (or 325553 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 47854821 is about 6917.7179040490. The cubic root of 47854821 is about 363.0573488914.

The spelling of 47854821 in words is "forty-seven million, eight hundred fifty-four thousand, eight hundred twenty-one".