195156001 has 2 divisors, whose sum is σ = 195156002. Its totient is φ = 195156000.

The previous prime is 195155999. The next prime is 195156007. The reversal of 195156001 is 100651591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169390225 + 25765776 = 13015^2 + 5076^2 .

It is an emirp because it is prime and its reverse (100651591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195156001 - 2¹ = 195155999 is a prime.

Together with 195155999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (195156007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97578000 + 97578001.

It is an arithmetic number, because the mean of its divisors is an integer number (97578001).

Almost surely, 2^195156001 is an apocalyptic number.

It is an amenable number.

195156001 is a deficient number, since it is larger than the sum of its proper divisors (1).

195156001 is an equidigital number, since it uses as much as digits as its factorization.

195156001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 195156001 is about 13969.8246588853. The cubic root of 195156001 is about 580.0435966040.

The spelling of 195156001 in words is "one hundred ninety-five million, one hundred fifty-six thousand, one".