47855231 has 2 divisors, whose sum is σ = 47855232. Its totient is φ = 47855230.

The previous prime is 47855201. The next prime is 47855233. The reversal of 47855231 is 13255874.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47855231 - 2¹⁰ = 47854207 is a prime.

It is a super-2 number, since 2×47855231² = 4580246268126722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 47855233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47855191 and 47855200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47855233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23927615 + 23927616.

It is an arithmetic number, because the mean of its divisors is an integer number (23927616).

Almost surely, 2^47855231 is an apocalyptic number.

47855231 is a deficient number, since it is larger than the sum of its proper divisors (1).

47855231 is an equidigital number, since it uses as much as digits as its factorization.

47855231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 35.

The square root of 47855231 is about 6917.7475380358. The cubic root of 47855231 is about 363.0583857294.

The spelling of 47855231 in words is "forty-seven million, eight hundred fifty-five thousand, two hundred thirty-one".