47240521 has 2 divisors, whose sum is σ = 47240522. Its totient is φ = 47240520.

The previous prime is 47240513. The next prime is 47240537. The reversal of 47240521 is 12504274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47114496 + 126025 = 6864^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 47240521 - 2³ = 47240513 is a prime.

It is not a weakly prime, because it can be changed into another prime (47244521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23620260 + 23620261.

It is an arithmetic number, because the mean of its divisors is an integer number (23620261).

Almost surely, 2^47240521 is an apocalyptic number.

It is an amenable number.

47240521 is a deficient number, since it is larger than the sum of its proper divisors (1).

47240521 is an equidigital number, since it uses as much as digits as its factorization.

47240521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 47240521 is about 6873.1740120559. The cubic root of 47240521 is about 361.4971626248.

Adding to 47240521 its reverse (12504274), we get a palindrome (59744795).

The spelling of 47240521 in words is "forty-seven million, two hundred forty thousand, five hundred twenty-one".