3131220224 has 72 divisors (see below), whose sum is σ = 7038554880. Its totient is φ = 1377331200.

The previous prime is 3131220187. The next prime is 3131220233. The reversal of 3131220224 is 4220221313.

It is a super-2 number, since 2×3131220224² = 19609080182373220352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3131220196 and 3131220205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69362 + ... + 105230.

Almost surely, 2^3131220224 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 3131220224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3519277440).

3131220224 is an abundant number, since it is smaller than the sum of its proper divisors (3907334656).

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

3131220224 is a wasteful number, since it uses less digits than its factorization.

3131220224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35927 (or 35913 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3131220224 is about 55957.3071546514. The cubic root of 3131220224 is about 1462.9782552953.

Adding to 3131220224 its reverse (4220221313), we get a palindrome (7351441537).

The spelling of 3131220224 in words is "three billion, one hundred thirty-one million, two hundred twenty thousand, two hundred twenty-four".