52641521 has 2 divisors, whose sum is σ = 52641522. Its totient is φ = 52641520.

The previous prime is 52641517. The next prime is 52641553. The reversal of 52641521 is 12514625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52200625 + 440896 = 7225^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 52641521 - 2² = 52641517 is a prime.

It is a super-2 number, since 2×52641521² = 5542259466386882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (52641821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26320760 + 26320761.

It is an arithmetic number, because the mean of its divisors is an integer number (26320761).

Almost surely, 2^52641521 is an apocalyptic number.

It is an amenable number.

52641521 is a deficient number, since it is larger than the sum of its proper divisors (1).

52641521 is an equidigital number, since it uses as much as digits as its factorization.

52641521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 26.

The square root of 52641521 is about 7255.4476774352. The cubic root of 52641521 is about 374.7797723210.

The spelling of 52641521 in words is "fifty-two million, six hundred forty-one thousand, five hundred twenty-one".