3131421140 has 48 divisors (see below), whose sum is σ = 6701208528. Its totient is φ = 1228898304.

The previous prime is 3131421127. The next prime is 3131421149. The reversal of 3131421140 is 411241313.

It can be written as a sum of positive squares in 8 ways, for example, as 804516496 + 2326904644 = 28364^2 + 48238^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131421149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276224 + ... + 287336.

It is an arithmetic number, because the mean of its divisors is an integer number (139608511).

Almost surely, 2^3131421140 is an apocalyptic number.

It is an amenable number.

3131421140 is an abundant number, since it is smaller than the sum of its proper divisors (3569787388).

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

3131421140 is a wasteful number, since it uses less digits than its factorization.

3131421140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388 (or 11386 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 3131421140 is about 55959.1023873686. The cubic root of 3131421140 is about 1463.0095454880.

Adding to 3131421140 its reverse (411241313), we get a palindrome (3542662453).

The spelling of 3131421140 in words is "three billion, one hundred thirty-one million, four hundred twenty-one thousand, one hundred forty".