1331228195 has 32 divisors (see below), whose sum is σ = 1815975936. Its totient is φ = 928051200.

The previous prime is 1331228183. The next prime is 1331228207. The reversal of 1331228195 is 5918221331.

It is a Cunningham number, because it is equal to 36486²-1.

It is an interprime number because it is at equal distance from previous prime (1331228183) and next prime (1331228207).

It is not a de Polignac number, because 1331228195 - 2⁸ = 1331227939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 178787 + ... + 186083.

It is an arithmetic number, because the mean of its divisors is an integer number (56749248).

Almost surely, 2^1331228195 is an apocalyptic number.

1331228195 is a deficient number, since it is larger than the sum of its proper divisors (484747741).

1331228195 is a wasteful number, since it uses less digits than its factorization.

1331228195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451.

The product of its digits is 12960, while the sum is 35.

The square root of 1331228195 is about 36485.9999862961. Note that the first 4 decimals coincide. The cubic root of 1331228195 is about 1100.0628600441.

The spelling of 1331228195 in words is "one billion, three hundred thirty-one million, two hundred twenty-eight thousand, one hundred ninety-five".