53156321 has 2 divisors, whose sum is σ = 53156322. Its totient is φ = 53156320.

The previous prime is 53156317. The next prime is 53156339. The reversal of 53156321 is 12365135.

53156321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52765696 + 390625 = 7264^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 53156321 - 2² = 53156317 is a prime.

It is not a weakly prime, because it can be changed into another prime (53156371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26578160 + 26578161.

It is an arithmetic number, because the mean of its divisors is an integer number (26578161).

Almost surely, 2^53156321 is an apocalyptic number.

It is an amenable number.

53156321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53156321 is an equidigital number, since it uses as much as digits as its factorization.

53156321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 26.

The square root of 53156321 is about 7290.8381548351. The cubic root of 53156321 is about 375.9975125269.

The spelling of 53156321 in words is "fifty-three million, one hundred fifty-six thousand, three hundred twenty-one".