47388231 has 48 divisors (see below), whose sum is σ = 81308448. Its totient is φ = 26265600.

The previous prime is 47388227. The next prime is 47388241. The reversal of 47388231 is 13288374.

47388231 is a `hidden beast` number, since 47 + 388 + 231 = 666.

47388231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47388231 - 2² = 47388227 is a prime.

It is a super-2 number, since 2×47388231² = 4491288874618722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47388241) 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 47 ways as a sum of consecutive naturals, for example, 61891 + ... + 62651.

It is an arithmetic number, because the mean of its divisors is an integer number (1693926).

Almost surely, 2^47388231 is an apocalyptic number.

47388231 is a deficient number, since it is larger than the sum of its proper divisors (33920217).

47388231 is a wasteful number, since it uses less digits than its factorization.

47388231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 829 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 47388231 is about 6883.9110249915. The cubic root of 47388231 is about 361.8735428185.

The spelling of 47388231 in words is "forty-seven million, three hundred eighty-eight thousand, two hundred thirty-one".