2195531 has 4 divisors (see below), whose sum is σ = 2364432. Its totient is φ = 2026632.

The previous prime is 2195527. The next prime is 2195563. The reversal of 2195531 is 1355912.

2195531 = 218² + 219² + ... + 256².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2195531 - 2² = 2195527 is a prime.

It is a super-2 number, since 2×2195531² = 9640712743922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2195531.

It is not an unprimeable number, because it can be changed into a prime (2195521) 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 3 ways as a sum of consecutive naturals, for example, 84431 + ... + 84456.

It is an arithmetic number, because the mean of its divisors is an integer number (591108).

2^2195531 is an apocalyptic number.

2195531 is a deficient number, since it is larger than the sum of its proper divisors (168901).

2195531 is a wasteful number, since it uses less digits than its factorization.

2195531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168900.

The product of its digits is 1350, while the sum is 26.

The square root of 2195531 is about 1481.7324319863. The cubic root of 2195531 is about 129.9710191808.

The spelling of 2195531 in words is "two million, one hundred ninety-five thousand, five hundred thirty-one".