47317551 has 4 divisors (see below), whose sum is σ = 63090072. Its totient is φ = 31545032.

The previous prime is 47317549. The next prime is 47317559. The reversal of 47317551 is 15571374.

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 47317551 - 2¹ = 47317549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47317559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7886256 + ... + 7886261.

It is an arithmetic number, because the mean of its divisors is an integer number (15772518).

Almost surely, 2^47317551 is an apocalyptic number.

47317551 is a deficient number, since it is larger than the sum of its proper divisors (15772521).

47317551 is a wasteful number, since it uses less digits than its factorization.

47317551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15772520.

The product of its digits is 14700, while the sum is 33.

The square root of 47317551 is about 6878.7753997350. The cubic root of 47317551 is about 361.6935406799.

The spelling of 47317551 in words is "forty-seven million, three hundred seventeen thousand, five hundred fifty-one".