3131123040 has 288 divisors, whose sum is σ = 11466917280. Its totient is φ = 805883904.

The previous prime is 3131123027. The next prime is 3131123041. The reversal of 3131123040 is 403211313.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131123041) 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 47 ways as a sum of consecutive naturals, for example, 1126132 + ... + 1128908.

It is an arithmetic number, because the mean of its divisors is an integer number (39815685).

Almost surely, 2^3131123040 is an apocalyptic number.

3131123040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131123040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5733458640).

3131123040 is an abundant number, since it is smaller than the sum of its proper divisors (8335794240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3131123040 is a wasteful number, since it uses less digits than its factorization.

3131123040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836 (or 2816 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3131123040 is about 55956.4387716016. The cubic root of 3131123040 is about 1462.9631196039.

Adding to 3131123040 its reverse (403211313), we get a palindrome (3534334353).

The spelling of 3131123040 in words is "three billion, one hundred thirty-one million, one hundred twenty-three thousand, forty".