3131002420 has 96 divisors (see below), whose sum is σ = 8444395008. Its totient is φ = 947814912.

The previous prime is 3131002379. The next prime is 3131002447. The reversal of 3131002420 is 242001313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3131002394 and 3131002403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4462 + ... + 79258.

It is an arithmetic number, because the mean of its divisors is an integer number (87962448).

Almost surely, 2^3131002420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131002420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4222197504).

3131002420 is an abundant number, since it is smaller than the sum of its proper divisors (5313392588).

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

3131002420 is a wasteful number, since it uses less digits than its factorization.

3131002420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74849 (or 74847 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3131002420 is about 55955.3609585355. The cubic root of 3131002420 is about 1462.9443334926.

Adding to 3131002420 its reverse (242001313), we get a palindrome (3373003733).

The spelling of 3131002420 in words is "three billion, one hundred thirty-one million, two thousand, four hundred twenty".