3131423156 has 6 divisors (see below), whose sum is σ = 5479990530. Its totient is φ = 1565711576.

The previous prime is 3131423147. The next prime is 3131423189. The reversal of 3131423156 is 6513241313.

It can be written as a sum of positive squares in only one way, i.e., 3117435556 + 13987600 = 55834^2 + 3740^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391427891 + ... + 391427898.

It is an arithmetic number, because the mean of its divisors is an integer number (913331755).

Almost surely, 2^3131423156 is an apocalyptic number.

It is an amenable number.

3131423156 is a deficient number, since it is larger than the sum of its proper divisors (2348567374).

3131423156 is a wasteful number, since it uses less digits than its factorization.

3131423156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782855793 (or 782855791 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 3131423156 is about 55959.1204005210. The cubic root of 3131423156 is about 1463.0098594484.

Adding to 3131423156 its reverse (6513241313), we get a palindrome (9644664469).

The spelling of 3131423156 in words is "three billion, one hundred thirty-one million, four hundred twenty-three thousand, one hundred fifty-six".