47453521 has 2 divisors, whose sum is σ = 47453522. Its totient is φ = 47453520.

The previous prime is 47453519. The next prime is 47453533. The reversal of 47453521 is 12535474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45711121 + 1742400 = 6761^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 47453521 - 2¹ = 47453519 is a prime.

Together with 47453519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (47453501) 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 as a sum of consecutive naturals, namely, 23726760 + 23726761.

It is an arithmetic number, because the mean of its divisors is an integer number (23726761).

Almost surely, 2^47453521 is an apocalyptic number.

It is an amenable number.

47453521 is a deficient number, since it is larger than the sum of its proper divisors (1).

47453521 is an equidigital number, since it uses as much as digits as its factorization.

47453521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 47453521 is about 6888.6516097129. The cubic root of 47453521 is about 362.0396591776.

Adding to 47453521 its reverse (12535474), we get a palindrome (59988995).

It can be divided in two parts, 47453 and 521, that added together give a palindrome (47974).

The spelling of 47453521 in words is "forty-seven million, four hundred fifty-three thousand, five hundred twenty-one".