131022013 has 4 divisors (see below), whose sum is σ = 131077468. Its totient is φ = 130966560.

The previous prime is 131022011. The next prime is 131022037. The reversal of 131022013 is 310220131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119311929 + 11710084 = 10923^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 131022013 - 2¹ = 131022011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131021984 and 131022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131022011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 24018 + ... + 28963.

It is an arithmetic number, because the mean of its divisors is an integer number (32769367).

Almost surely, 2^131022013 is an apocalyptic number.

It is an amenable number.

131022013 is a deficient number, since it is larger than the sum of its proper divisors (55455).

131022013 is an equidigital number, since it uses as much as digits as its factorization.

131022013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55454.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 131022013 is about 11446.4847442348. The cubic root of 131022013 is about 507.9037536988.

Adding to 131022013 its reverse (310220131), we get a palindrome (441242144).

The spelling of 131022013 in words is "one hundred thirty-one million, twenty-two thousand, thirteen".