53656321 has 2 divisors, whose sum is σ = 53656322. Its totient is φ = 53656320.

The previous prime is 53656297. The next prime is 53656397. The reversal of 53656321 is 12365635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52780225 + 876096 = 7265^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 53656321 - 2⁵ = 53656289 is a prime.

It is not a weakly prime, because it can be changed into another prime (53656121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26828160 + 26828161.

It is an arithmetic number, because the mean of its divisors is an integer number (26828161).

Almost surely, 2^53656321 is an apocalyptic number.

It is an amenable number.

53656321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53656321 is an equidigital number, since it uses as much as digits as its factorization.

53656321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The square root of 53656321 is about 7325.0475083784. The cubic root of 53656321 is about 377.1727403665.

The spelling of 53656321 in words is "fifty-three million, six hundred fifty-six thousand, three hundred twenty-one".