5131221532 has 24 divisors (see below), whose sum is σ = 9117844736. Its totient is φ = 2526158448.

The previous prime is 5131221499. The next prime is 5131221541. The reversal of 5131221532 is 2351221315.

It is a junction number, because it is equal to n+sod(n) for n = 5131221497 and 5131221506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070413 + ... + 1075195.

Almost surely, 2^5131221532 is an apocalyptic number.

It is an amenable number.

5131221532 is a deficient number, since it is larger than the sum of its proper divisors (3986623204).

5131221532 is a wasteful number, since it uses less digits than its factorization.

5131221532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8857 (or 8855 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 5131221532 is about 71632.5452011863. The cubic root of 5131221532 is about 1724.8060029122.

Adding to 5131221532 its reverse (2351221315), we get a palindrome (7482442847).

The spelling of 5131221532 in words is "five billion, one hundred thirty-one million, two hundred twenty-one thousand, five hundred thirty-two".