3155231971 has 4 divisors (see below), whose sum is σ = 3155369112. Its totient is φ = 3155094832.

The previous prime is 3155231951. The next prime is 3155232019. The reversal of 3155231971 is 1791325513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1791325513 = 17 ⋅105372089.

It is a cyclic number.

It is not a de Polignac number, because 3155231971 - 2⁵ = 3155231939 is a prime.

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 3155231971.

It is not an unprimeable number, because it can be changed into a prime (3155231951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24706 + ... + 83191.

It is an arithmetic number, because the mean of its divisors is an integer number (788842278).

Almost surely, 2^3155231971 is an apocalyptic number.

3155231971 is a deficient number, since it is larger than the sum of its proper divisors (137141).

3155231971 is a wasteful number, since it uses less digits than its factorization.

3155231971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137140.

The product of its digits is 28350, while the sum is 37.

The square root of 3155231971 is about 56171.4515657198. The cubic root of 3155231971 is about 1466.7083506117.

The spelling of 3155231971 in words is "three billion, one hundred fifty-five million, two hundred thirty-one thousand, nine hundred seventy-one".