195770551 has 2 divisors, whose sum is σ = 195770552. Its totient is φ = 195770550.

The previous prime is 195770543. The next prime is 195770609. The reversal of 195770551 is 155077591.

It is a weak prime.

It is an emirp because it is prime and its reverse (155077591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195770551 - 2³ = 195770543 is a prime.

It is a super-2 number, since 2×195770551² = 76652217277687202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195770251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97885275 + 97885276.

It is an arithmetic number, because the mean of its divisors is an integer number (97885276).

Almost surely, 2^195770551 is an apocalyptic number.

195770551 is a deficient number, since it is larger than the sum of its proper divisors (1).

195770551 is an equidigital number, since it uses as much as digits as its factorization.

195770551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55125, while the sum is 40.

The square root of 195770551 is about 13991.8029931814. The cubic root of 195770551 is about 580.6518147665.

The spelling of 195770551 in words is "one hundred ninety-five million, seven hundred seventy thousand, five hundred fifty-one".