47878231 has 2 divisors, whose sum is σ = 47878232. Its totient is φ = 47878230.

The previous prime is 47878219. The next prime is 47878247. The reversal of 47878231 is 13287874.

47878231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47878231 - 2⁵ = 47878199 is a prime.

It is a super-2 number, since 2×47878231² = 4584650007378722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47878261) 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 as a sum of consecutive naturals, namely, 23939115 + 23939116.

It is an arithmetic number, because the mean of its divisors is an integer number (23939116).

Almost surely, 2^47878231 is an apocalyptic number.

47878231 is a deficient number, since it is larger than the sum of its proper divisors (1).

47878231 is an equidigital number, since it uses as much as digits as its factorization.

47878231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 40.

The square root of 47878231 is about 6919.4097291604. The cubic root of 47878231 is about 363.1165403294.

The spelling of 47878231 in words is "forty-seven million, eight hundred seventy-eight thousand, two hundred thirty-one".