5231131220 has 36 divisors (see below), whose sum is σ = 12778908660. Its totient is φ = 1793530368.

The previous prime is 5231131211. The next prime is 5231131289. The reversal of 5231131220 is 221311325.

It can be written as a sum of positive squares in 2 ways, for example, as 3988427716 + 1242703504 = 63154^2 + 35252^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 5231131192 and 5231131201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2667965 + ... + 2669924.

It is an arithmetic number, because the mean of its divisors is an integer number (354969685).

Almost surely, 2^5231131220 is an apocalyptic number.

It is an amenable number.

5231131220 is an abundant number, since it is smaller than the sum of its proper divisors (7547777440).

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

5231131220 is a wasteful number, since it uses less digits than its factorization.

5231131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337912 (or 5337903 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 5231131220 is about 72326.5595753040. The cubic root of 5231131220 is about 1735.9286521145.

Adding to 5231131220 its reverse (221311325), we get a palindrome (5452442545).

The spelling of 5231131220 in words is "five billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty".