3122171397 has 12 divisors (see below), whose sum is σ = 4775085900. Its totient is φ = 1959009408.

The previous prime is 3122171387. The next prime is 3122171399. The reversal of 3122171397 is 7931712213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1265509476 + 1856661921 = 35574^2 + 43089^2 .

It is not a de Polignac number, because 3122171397 - 2²⁰ = 3121122821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3122171399) 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 11 ways as a sum of consecutive naturals, for example, 10203022 + ... + 10203327.

It is an arithmetic number, because the mean of its divisors is an integer number (397923825).

Almost surely, 2^3122171397 is an apocalyptic number.

It is an amenable number.

3122171397 is a deficient number, since it is larger than the sum of its proper divisors (1652914503).

3122171397 is a wasteful number, since it uses less digits than its factorization.

3122171397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20406372 (or 20406369 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 3122171397 is about 55876.3939154989. The cubic root of 3122171397 is about 1461.5676220625.

The spelling of 3122171397 in words is "three billion, one hundred twenty-two million, one hundred seventy-one thousand, three hundred ninety-seven".