163505851 has 2 divisors, whose sum is σ = 163505852. Its totient is φ = 163505850.

The previous prime is 163505831. The next prime is 163505861. The reversal of 163505851 is 158505361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163505851 - 2¹⁵ = 163473083 is a prime.

It is a super-2 number, since 2×163505851² = 53468326622468402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163505821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81752925 + 81752926.

It is an arithmetic number, because the mean of its divisors is an integer number (81752926).

Almost surely, 2^163505851 is an apocalyptic number.

163505851 is a deficient number, since it is larger than the sum of its proper divisors (1).

163505851 is an equidigital number, since it uses as much as digits as its factorization.

163505851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 163505851 is about 12786.9406427026. The cubic root of 163505851 is about 546.8200531722.

It can be divided in two parts, 16350 and 5851, that added together give a square (22201 = 149²).

The spelling of 163505851 in words is "one hundred sixty-three million, five hundred five thousand, eight hundred fifty-one".