3131000220 has 24 divisors (see below), whose sum is σ = 8766800784. Its totient is φ = 834933376.

The previous prime is 3131000203. The next prime is 3131000221. The reversal of 3131000220 is 220001313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 3131000196 and 3131000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131000221) 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, 26091609 + ... + 26091728.

It is an arithmetic number, because the mean of its divisors is an integer number (365283366).

Almost surely, 2^3131000220 is an apocalyptic number.

3131000220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131000220 is an abundant number, since it is smaller than the sum of its proper divisors (5635800564).

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

3131000220 is a wasteful number, since it uses less digits than its factorization.

3131000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52183349 (or 52183347 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 3131000220 is about 55955.3413000046. The cubic root of 3131000220 is about 1462.9439908464.

Adding to 3131000220 its reverse (220001313), we get a palindrome (3351001533).

The spelling of 3131000220 in words is "three billion, one hundred thirty-one million, two hundred twenty", and thus it is an aban number.