47645145 has 32 divisors (see below), whose sum is σ = 86313600. Its totient is φ = 24927552.

The previous prime is 47645123. The next prime is 47645149. The reversal of 47645145 is 54154674.

47645145 is a `hidden beast` number, since 4 + 7 + 645 + 1 + 4 + 5 = 666.

47645145 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 47645145 - 2¹² = 47641049 is a prime.

Its product of digits (67200) is a multiple of the sum of its prime divisors (6720).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47645149) 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 31 ways as a sum of consecutive naturals, for example, 3826 + ... + 10484.

It is an arithmetic number, because the mean of its divisors is an integer number (2697300).

Almost surely, 2^47645145 is an apocalyptic number.

47645145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47645145 is a deficient number, since it is larger than the sum of its proper divisors (38668455).

47645145 is a wasteful number, since it uses less digits than its factorization.

47645145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6726 (or 6720 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 47645145 is about 6902.5462693125. The cubic root of 47645145 is about 362.5263270614.

The spelling of 47645145 in words is "forty-seven million, six hundred forty-five thousand, one hundred forty-five".