53172517 has 2 divisors, whose sum is σ = 53172518. Its totient is φ = 53172516.

The previous prime is 53172503. The next prime is 53172547. The reversal of 53172517 is 71527135.

53172517 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., 32251041 + 20921476 = 5679^2 + 4574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53172517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53172547) 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, 26586258 + 26586259.

It is an arithmetic number, because the mean of its divisors is an integer number (26586259).

Almost surely, 2^53172517 is an apocalyptic number.

It is an amenable number.

53172517 is a deficient number, since it is larger than the sum of its proper divisors (1).

53172517 is an equidigital number, since it uses as much as digits as its factorization.

53172517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 31.

The square root of 53172517 is about 7291.9487793045. The cubic root of 53172517 is about 376.0356957397.

The spelling of 53172517 in words is "fifty-three million, one hundred seventy-two thousand, five hundred seventeen".