3948218631131 has 4 divisors (see below), whose sum is σ = 4084364101200. Its totient is φ = 3812073161064.

The previous prime is 3948218631121. The next prime is 3948218631151. The reversal of 3948218631131 is 1311368128493.

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 3948218631131 - 2¹⁰ = 3948218630107 is a prime.

It is a super-2 number, since 2×3948218631131² (a number of 26 digits) 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 3948218631131.

It is not an unprimeable number, because it can be changed into a prime (3948218631121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68072734991 + ... + 68072735048.

It is an arithmetic number, because the mean of its divisors is an integer number (1021091025300).

Almost surely, 2^{3948218631131} is an apocalyptic number.

3948218631131 is a deficient number, since it is larger than the sum of its proper divisors (136145470069).

3948218631131 is a wasteful number, since it uses less digits than its factorization.

3948218631131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136145470068.

The product of its digits is 746496, while the sum is 50.

The spelling of 3948218631131 in words is "three trillion, nine hundred forty-eight billion, two hundred eighteen million, six hundred thirty-one thousand, one hundred thirty-one".