2131995 has 16 divisors (see below), whose sum is σ = 3451680. Its totient is φ = 1123584.

The previous prime is 2131991. The next prime is 2132003. The reversal of 2131995 is 5991312.

It is not a de Polignac number, because 2131995 - 2² = 2131991 is a prime.

2131995 is a lucky number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2131991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537 + ... + 2133.

It is an arithmetic number, because the mean of its divisors is an integer number (215730).

2^2131995 is an apocalyptic number.

2131995 is a deficient number, since it is larger than the sum of its proper divisors (1319685).

2131995 is a wasteful number, since it uses less digits than its factorization.

2131995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694.

The product of its digits is 2430, while the sum is 30.

The square root of 2131995 is about 1460.1352677064. The cubic root of 2131995 is about 128.7049925948.

The spelling of 2131995 in words is "two million, one hundred thirty-one thousand, nine hundred ninety-five".