3131445120 has 128 divisors (see below), whose sum is σ = 9997166880. Its totient is φ = 833740800.

The previous prime is 3131445103. The next prime is 3131445133. The reversal of 3131445120 is 215441313.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2266830 + ... + 2268210.

Almost surely, 2^3131445120 is an apocalyptic number.

3131445120 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 3131445120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4998583440).

3131445120 is an abundant number, since it is smaller than the sum of its proper divisors (6865721760).

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

3131445120 is a wasteful number, since it uses less digits than its factorization.

3131445120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 3131445120 is about 55959.3166505811. The cubic root of 3131445120 is about 1463.0132799883.

Adding to 3131445120 its reverse (215441313), we get a palindrome (3346886433).

The spelling of 3131445120 in words is "three billion, one hundred thirty-one million, four hundred forty-five thousand, one hundred twenty".