2531361222 has 144 divisors (see below), whose sum is σ = 6448674960. Its totient is φ = 711389952.

The previous prime is 2531361211. The next prime is 2531361223. The reversal of 2531361222 is 2221631352.

It is a happy number.

2531361222 is a `hidden beast` number, since 2 + 531 + 3 + 6 + 122 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531361223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3738748 + ... + 3739424.

It is an arithmetic number, because the mean of its divisors is an integer number (44782465).

Almost surely, 2^2531361222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2531361222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3224337480).

2531361222 is an abundant number, since it is smaller than the sum of its proper divisors (3917313738).

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

2531361222 is a wasteful number, since it uses less digits than its factorization.

2531361222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 743 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2531361222 is about 50312.6348147262. The cubic root of 2531361222 is about 1362.8604051996.

Adding to 2531361222 its reverse (2221631352), we get a palindrome (4752992574).

The spelling of 2531361222 in words is "two billion, five hundred thirty-one million, three hundred sixty-one thousand, two hundred twenty-two".