131313213 has 6 divisors (see below), whose sum is σ = 189674654. Its totient is φ = 87542136.

The previous prime is 131313197. The next prime is 131313229. The reversal of 131313213 is 312313131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131313197) and next prime (131313229).

It can be written as a sum of positive squares in only one way, i.e., 124947684 + 6365529 = 11178^2 + 2523^2 .

It is not a de Polignac number, because 131313213 - 2⁴ = 131313197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131313263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7295170 + ... + 7295187.

Almost surely, 2^131313213 is an apocalyptic number.

It is an amenable number.

131313213 is a deficient number, since it is larger than the sum of its proper divisors (58361441).

131313213 is a wasteful number, since it uses less digits than its factorization.

131313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14590363 (or 14590360 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 131313213 is about 11459.1977467884. The cubic root of 131313213 is about 508.2797519325.

Adding to 131313213 its reverse (312313131), we get a palindrome (443626344).

The spelling of 131313213 in words is "one hundred thirty-one million, three hundred thirteen thousand, two hundred thirteen".