53178661 has 2 divisors, whose sum is σ = 53178662. Its totient is φ = 53178660.

The previous prime is 53178611. The next prime is 53178683. The reversal of 53178661 is 16687135.

53178661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44970436 + 8208225 = 6706^2 + 2865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53178661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53178661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53178611) 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, 26589330 + 26589331.

It is an arithmetic number, because the mean of its divisors is an integer number (26589331).

Almost surely, 2^53178661 is an apocalyptic number.

It is an amenable number.

53178661 is a deficient number, since it is larger than the sum of its proper divisors (1).

53178661 is an equidigital number, since it uses as much as digits as its factorization.

53178661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 53178661 is about 7292.3700536931. The cubic root of 53178661 is about 376.0501786246.

The spelling of 53178661 in words is "fifty-three million, one hundred seventy-eight thousand, six hundred sixty-one".