131031213 has 8 divisors (see below), whose sum is σ = 174763776. Its totient is φ = 87326400.

The previous prime is 131031209. The next prime is 131031227. The reversal of 131031213 is 312130131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131031213 - 2² = 131031209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131031192 and 131031201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9973 + ... + 19013.

It is an arithmetic number, because the mean of its divisors is an integer number (21845472).

Almost surely, 2^131031213 is an apocalyptic number.

It is an amenable number.

131031213 is a deficient number, since it is larger than the sum of its proper divisors (43732563).

131031213 is an equidigital number, since it uses as much as digits as its factorization.

131031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13875.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 131031213 is about 11446.8866072832. The cubic root of 131031213 is about 507.9156412818.

Adding to 131031213 its reverse (312130131), we get a palindrome (443161344).

It can be divided in two parts, 1310 and 31213, that added together give a palindrome (32523).

The spelling of 131031213 in words is "one hundred thirty-one million, thirty-one thousand, two hundred thirteen".