3131403320 has 32 divisors (see below), whose sum is σ = 7063804800. Its totient is φ = 1249335168.

The previous prime is 3131403311. The next prime is 3131403329. The reversal of 3131403320 is 233041313.

3131403320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3131403311) and next prime (3131403329).

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

It is a junction number, because it is equal to n+sod(n) for n = 3131403292 and 3131403301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131403329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85064 + ... + 116183.

It is an arithmetic number, because the mean of its divisors is an integer number (220743900).

Almost surely, 2^3131403320 is an apocalyptic number.

It is an amenable number.

3131403320 is an abundant number, since it is smaller than the sum of its proper divisors (3932401480).

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

3131403320 is a wasteful number, since it uses less digits than its factorization.

3131403320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201647 (or 201643 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 3131403320 is about 55958.9431637160. The cubic root of 3131403320 is about 1463.0067702966.

Adding to 3131403320 its reverse (233041313), we get a palindrome (3364444633).

The spelling of 3131403320 in words is "three billion, one hundred thirty-one million, four hundred three thousand, three hundred twenty".