47303781 has 32 divisors (see below), whose sum is σ = 74449920. Its totient is φ = 26158464.

The previous prime is 47303777. The next prime is 47303803. The reversal of 47303781 is 18730374.

47303781 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 47303781 - 2² = 47303777 is a prime.

It is a super-2 number, since 2×47303781² = 4475295393791922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47303701) 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, 90186 + ... + 90708.

It is an arithmetic number, because the mean of its divisors is an integer number (2326560).

Almost surely, 2^47303781 is an apocalyptic number.

It is an amenable number.

47303781 is a deficient number, since it is larger than the sum of its proper divisors (27146139).

47303781 is a wasteful number, since it uses less digits than its factorization.

47303781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 47303781 is about 6877.7744220060. The cubic root of 47303781 is about 361.6584514924.

It can be divided in two parts, 47303 and 781, that added together give a palindrome (48084).

The spelling of 47303781 in words is "forty-seven million, three hundred three thousand, seven hundred eighty-one".