47342521 has 2 divisors, whose sum is σ = 47342522. Its totient is φ = 47342520.

The previous prime is 47342513. The next prime is 47342543. The reversal of 47342521 is 12524374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28515600 + 18826921 = 5340^2 + 4339^2 .

It is a cyclic number.

It is not a de Polignac number, because 47342521 - 2³ = 47342513 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47342521.

It is not a weakly prime, because it can be changed into another prime (47342551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23671260 + 23671261.

It is an arithmetic number, because the mean of its divisors is an integer number (23671261).

Almost surely, 2^47342521 is an apocalyptic number.

It is an amenable number.

47342521 is a deficient number, since it is larger than the sum of its proper divisors (1).

47342521 is an equidigital number, since it uses as much as digits as its factorization.

47342521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 47342521 is about 6880.5901636415. The cubic root of 47342521 is about 361.7571527316.

Adding to 47342521 its reverse (12524374), we get a palindrome (59866895).

The spelling of 47342521 in words is "forty-seven million, three hundred forty-two thousand, five hundred twenty-one".