3131223450 has 96 divisors (see below), whose sum is σ = 8291897856. Its totient is φ = 780077760.

The previous prime is 3131223443. The next prime is 3131223451. The reversal of 3131223450 is 543221313.

It is a self number, because there is not a number n which added to its sum of digits gives 3131223450.

It is not an unprimeable number, because it can be changed into a prime (3131223451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137797 + ... + 158903.

It is an arithmetic number, because the mean of its divisors is an integer number (86373936).

Almost surely, 2^3131223450 is an apocalyptic number.

3131223450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131223450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4145948928).

3131223450 is an abundant number, since it is smaller than the sum of its proper divisors (5160674406).

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

3131223450 is a wasteful number, since it uses less digits than its factorization.

3131223450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21188 (or 21183 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 3131223450 is about 55957.3359801912. The cubic root of 3131223450 is about 1462.9787577157.

Adding to 3131223450 its reverse (543221313), we get a palindrome (3674444763).

The spelling of 3131223450 in words is "three billion, one hundred thirty-one million, two hundred twenty-three thousand, four hundred fifty".