53217091 has 2 divisors, whose sum is σ = 53217092. Its totient is φ = 53217090.

The previous prime is 53217023. The next prime is 53217097. The reversal of 53217091 is 19071235.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53217091 is a prime.

It is not a weakly prime, because it can be changed into another prime (53217097) 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, 26608545 + 26608546.

It is an arithmetic number, because the mean of its divisors is an integer number (26608546).

Almost surely, 2^53217091 is an apocalyptic number.

53217091 is a deficient number, since it is larger than the sum of its proper divisors (1).

53217091 is an equidigital number, since it uses as much as digits as its factorization.

53217091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 53217091 is about 7295.0045236449. The cubic root of 53217091 is about 376.1407420718.

The spelling of 53217091 in words is "fifty-three million, two hundred seventeen thousand, ninety-one".