47478551 has 2 divisors, whose sum is σ = 47478552. Its totient is φ = 47478550.

The previous prime is 47478523. The next prime is 47478553. The reversal of 47478551 is 15587474.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47478551 - 2¹⁰ = 47477527 is a prime.

Together with 47478553, 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 = 47478499 and 47478508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47478553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23739275 + 23739276.

It is an arithmetic number, because the mean of its divisors is an integer number (23739276).

Almost surely, 2^47478551 is an apocalyptic number.

47478551 is a deficient number, since it is larger than the sum of its proper divisors (1).

47478551 is an equidigital number, since it uses as much as digits as its factorization.

47478551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156800, while the sum is 41.

The square root of 47478551 is about 6890.4681263322. The cubic root of 47478551 is about 362.1033022237.

The spelling of 47478551 in words is "forty-seven million, four hundred seventy-eight thousand, five hundred fifty-one".