195151955 has 4 divisors (see below), whose sum is σ = 234182352. Its totient is φ = 156121560.

The previous prime is 195151951. The next prime is 195151961. The reversal of 195151955 is 559151591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 559151591 = 1307 ⋅427813.

It is not a de Polignac number, because 195151955 - 2² = 195151951 is a prime.

It is a super-3 number, since 3×195151955³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195151951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19515191 + ... + 19515200.

It is an arithmetic number, because the mean of its divisors is an integer number (58545588).

Almost surely, 2^195151955 is an apocalyptic number.

195151955 is a deficient number, since it is larger than the sum of its proper divisors (39030397).

195151955 is an equidigital number, since it uses as much as digits as its factorization.

195151955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39030396.

The product of its digits is 50625, while the sum is 41.

The square root of 195151955 is about 13969.6798460094. The cubic root of 195151955 is about 580.0395880628.

The spelling of 195151955 in words is "one hundred ninety-five million, one hundred fifty-one thousand, nine hundred fifty-five".