131022522 has 60 divisors (see below), whose sum is σ = 305540730. Its totient is φ = 41915664.

The previous prime is 131022503. The next prime is 131022547. The reversal of 131022522 is 225220131.

It can be written as a sum of positive squares in only one way, i.e., 110691441 + 20331081 = 10521^2 + 4509^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131022495 and 131022504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 784483 + ... + 784649.

Almost surely, 2^131022522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131022522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152770365).

131022522 is an abundant number, since it is smaller than the sum of its proper divisors (174518208).

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

131022522 is an equidigital number, since it uses as much as digits as its factorization.

131022522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 131022522 is about 11446.5069781135. The cubic root of 131022522 is about 507.9044114067.

Adding to 131022522 its reverse (225220131), we get a palindrome (356242653).

It can be divided in two parts, 1310 and 22522, that added together give a palindrome (23832).

The spelling of 131022522 in words is "one hundred thirty-one million, twenty-two thousand, five hundred twenty-two".