195594251 has 2 divisors, whose sum is σ = 195594252. Its totient is φ = 195594250.

The previous prime is 195594233. The next prime is 195594281. The reversal of 195594251 is 152495591.

It is a weak prime.

It is an emirp because it is prime and its reverse (152495591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195594251 - 2¹⁸ = 195332107 is a prime.

It is a super-2 number, since 2×195594251² = 76514222048502002, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 195594199 and 195594208.

It is not a weakly prime, because it can be changed into another prime (195594281) 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, 97797125 + 97797126.

It is an arithmetic number, because the mean of its divisors is an integer number (97797126).

Almost surely, 2^195594251 is an apocalyptic number.

195594251 is a deficient number, since it is larger than the sum of its proper divisors (1).

195594251 is an equidigital number, since it uses as much as digits as its factorization.

195594251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 41.

The square root of 195594251 is about 13985.5014568660. The cubic root of 195594251 is about 580.4774615776.

The spelling of 195594251 in words is "one hundred ninety-five million, five hundred ninety-four thousand, two hundred fifty-one".