47306521 has 4 divisors (see below), whose sum is σ = 47458944. Its totient is φ = 47154100.

The previous prime is 47306509. The next prime is 47306531. The reversal of 47306521 is 12560374.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47306521 - 2¹¹ = 47304473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47306521.

It is not an unprimeable number, because it can be changed into a prime (47306531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75745 + ... + 76366.

It is an arithmetic number, because the mean of its divisors is an integer number (11864736).

Almost surely, 2^47306521 is an apocalyptic number.

It is an amenable number.

47306521 is a deficient number, since it is larger than the sum of its proper divisors (152423).

47306521 is a wasteful number, since it uses less digits than its factorization.

47306521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152422.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 47306521 is about 6877.9736114644. The cubic root of 47306521 is about 361.6654341972.

Adding to 47306521 its reverse (12560374), we get a palindrome (59866895).

The spelling of 47306521 in words is "forty-seven million, three hundred six thousand, five hundred twenty-one".