57201409 has 2 divisors, whose sum is σ = 57201410. Its totient is φ = 57201408.

The previous prime is 57201407. The next prime is 57201421. The reversal of 57201409 is 90410275.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47610000 + 9591409 = 6900^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 57201409 - 2¹ = 57201407 is a prime.

Together with 57201407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57201401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28600704 + 28600705.

It is an arithmetic number, because the mean of its divisors is an integer number (28600705).

Almost surely, 2^57201409 is an apocalyptic number.

It is an amenable number.

57201409 is a deficient number, since it is larger than the sum of its proper divisors (1).

57201409 is an equidigital number, since it uses as much as digits as its factorization.

57201409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 57201409 is about 7563.1613099285. The cubic root of 57201409 is about 385.3028684430.

The spelling of 57201409 in words is "fifty-seven million, two hundred one thousand, four hundred nine".