2195943138831 has 32 divisors (see below), whose sum is σ = 3238551447040. Its totient is φ = 1314752736384.

The previous prime is 2195943138751. The next prime is 2195943138841. The reversal of 2195943138831 is 1388313495912.

It is a happy number.

It is not a de Polignac number, because 2195943138831 - 2²⁶ = 2195876029967 is a prime.

It is a super-2 number, since 2×2195943138831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195943138841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36360846 + ... + 36421188.

It is an arithmetic number, because the mean of its divisors is an integer number (101204732720).

Almost surely, 2^{2195943138831} is an apocalyptic number.

2195943138831 is a deficient number, since it is larger than the sum of its proper divisors (1042608308209).

2195943138831 is a wasteful number, since it uses less digits than its factorization.

2195943138831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85615.

The product of its digits is 5598720, while the sum is 57.

The spelling of 2195943138831 in words is "two trillion, one hundred ninety-five billion, nine hundred forty-three million, one hundred thirty-eight thousand, eight hundred thirty-one".