878221471 has 4 divisors (see below), whose sum is σ = 908505000. Its totient is φ = 847937944.

The previous prime is 878221451. The next prime is 878221493. The reversal of 878221471 is 174122878.

878221471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 878221471 - 2¹¹ = 878219423 is a prime.

It is a super-3 number, since 3×878221471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878221441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15141721 + ... + 15141778.

It is an arithmetic number, because the mean of its divisors is an integer number (227126250).

Almost surely, 2^878221471 is an apocalyptic number.

878221471 is a deficient number, since it is larger than the sum of its proper divisors (30283529).

878221471 is a wasteful number, since it uses less digits than its factorization.

878221471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30283528.

The product of its digits is 50176, while the sum is 40.

The square root of 878221471 is about 29634.8016865307. The cubic root of 878221471 is about 957.6379542496.

The spelling of 878221471 in words is "eight hundred seventy-eight million, two hundred twenty-one thousand, four hundred seventy-one".