1995000331 has 2 divisors, whose sum is σ = 1995000332.
Its totient is φ = 1995000330.
The previous prime is 1995000313. The next prime is 1995000347. The reversal of 1995000331 is 1330005991.
Together with previous prime (1995000313) it forms an Ormiston pair, because they use the same digits, order apart.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 1995000331 - 227 = 1860782603 is a prime.
It is a super-2 number, since 2×19950003312 = 7960052641380219122, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 1995000293 and 1995000302.
It is not a weakly prime, because it can be changed into another prime (1995001331) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997500165 + 997500166.
It is an arithmetic number, because the mean of its divisors is an integer number (997500166).
Almost surely, 21995000331 is an apocalyptic number.
1995000331 is a deficient number, since it is larger than the sum of its proper divisors (1).
1995000331 is an equidigital number, since it uses as much as digits as its factorization.
1995000331 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 3645, while the sum is 31.
The square root of 1995000331 is about 44665.4265735815.
The cubic root of 1995000331 is about 1258.8703091459.
The spelling of 1995000331 in words is "one billion, nine hundred ninety-five million, three hundred thirty-one", and thus it is an aban number.