52081649 has 2 divisors, whose sum is σ = 52081650. Its totient is φ = 52081648.

The previous prime is 52081639. The next prime is 52081657. The reversal of 52081649 is 94618025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41473600 + 10608049 = 6440^2 + 3257^2 .

It is a cyclic number.

It is not a de Polignac number, because 52081649 - 2⁴ = 52081633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (52081639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26040824 + 26040825.

It is an arithmetic number, because the mean of its divisors is an integer number (26040825).

Almost surely, 2^52081649 is an apocalyptic number.

It is an amenable number.

52081649 is a deficient number, since it is larger than the sum of its proper divisors (1).

52081649 is an equidigital number, since it uses as much as digits as its factorization.

52081649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 52081649 is about 7216.7616698905. The cubic root of 52081649 is about 373.4463698074.

The spelling of 52081649 in words is "fifty-two million, eighty-one thousand, six hundred forty-nine".