855232517 has 2 divisors, whose sum is σ = 855232518. Its totient is φ = 855232516.

The previous prime is 855232471. The next prime is 855232561. The reversal of 855232517 is 715232558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586075681 + 269156836 = 24209^2 + 16406^2 .

It is a cyclic number.

It is not a de Polignac number, because 855232517 - 2⁶ = 855232453 is a prime.

It is a Chen prime.

It is equal to p_43836338 and since 855232517 and 43836338 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855232577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427616258 + 427616259.

It is an arithmetic number, because the mean of its divisors is an integer number (427616259).

Almost surely, 2^855232517 is an apocalyptic number.

It is an amenable number.

855232517 is a deficient number, since it is larger than the sum of its proper divisors (1).

855232517 is an equidigital number, since it uses as much as digits as its factorization.

855232517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 855232517 is about 29244.3587209568. The cubic root of 855232517 is about 949.2080258212.

The spelling of 855232517 in words is "eight hundred fifty-five million, two hundred thirty-two thousand, five hundred seventeen".