47911251 has 4 divisors (see below), whose sum is σ = 63881672. Its totient is φ = 31940832.

The previous prime is 47911249. The next prime is 47911261. The reversal of 47911251 is 15211974.

47911251 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 not a de Polignac number, because 47911251 - 2¹ = 47911249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47911211) 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 in 3 ways as a sum of consecutive naturals, for example, 7985206 + ... + 7985211.

It is an arithmetic number, because the mean of its divisors is an integer number (15970418).

Almost surely, 2^47911251 is an apocalyptic number.

47911251 is a deficient number, since it is larger than the sum of its proper divisors (15970421).

47911251 is a wasteful number, since it uses less digits than its factorization.

47911251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15970420.

The product of its digits is 2520, while the sum is 30.

The square root of 47911251 is about 6921.7953595870. The cubic root of 47911251 is about 363.1999975540.

The spelling of 47911251 in words is "forty-seven million, nine hundred eleven thousand, two hundred fifty-one".