53415391 has 2 divisors, whose sum is σ = 53415392. Its totient is φ = 53415390.

The previous prime is 53415379. The next prime is 53415409. The reversal of 53415391 is 19351435.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53415391 - 2¹¹ = 53413343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53415371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26707695 + 26707696.

It is an arithmetic number, because the mean of its divisors is an integer number (26707696).

Almost surely, 2^53415391 is an apocalyptic number.

53415391 is a deficient number, since it is larger than the sum of its proper divisors (1).

53415391 is an equidigital number, since it uses as much as digits as its factorization.

53415391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 53415391 is about 7308.5833784667. The cubic root of 53415391 is about 376.6073606822.

The spelling of 53415391 in words is "fifty-three million, four hundred fifteen thousand, three hundred ninety-one".