47513321 has 2 divisors, whose sum is σ = 47513322. Its totient is φ = 47513320.

The previous prime is 47513311. The next prime is 47513353. The reversal of 47513321 is 12331574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46389721 + 1123600 = 6811^2 + 1060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47513321 is a prime.

It is not a weakly prime, because it can be changed into another prime (47513311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23756660 + 23756661.

It is an arithmetic number, because the mean of its divisors is an integer number (23756661).

Almost surely, 2^47513321 is an apocalyptic number.

It is an amenable number.

47513321 is a deficient number, since it is larger than the sum of its proper divisors (1).

47513321 is an equidigital number, since it uses as much as digits as its factorization.

47513321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 26.

The square root of 47513321 is about 6892.9907152121. The cubic root of 47513321 is about 362.1916737752.

Adding to 47513321 its reverse (12331574), we get a palindrome (59844895).

The spelling of 47513321 in words is "forty-seven million, five hundred thirteen thousand, three hundred twenty-one".