131631413 has 2 divisors, whose sum is σ = 131631414. Its totient is φ = 131631412.

The previous prime is 131631403. The next prime is 131631427. The reversal of 131631413 is 314136131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106461124 + 25170289 = 10318^2 + 5017^2 .

It is a cyclic number.

It is not a de Polignac number, because 131631413 - 2¹⁸ = 131369269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131631403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65815706 + 65815707.

It is an arithmetic number, because the mean of its divisors is an integer number (65815707).

Almost surely, 2^131631413 is an apocalyptic number.

It is an amenable number.

131631413 is a deficient number, since it is larger than the sum of its proper divisors (1).

131631413 is an equidigital number, since it uses as much as digits as its factorization.

131631413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 131631413 is about 11473.0733894628. The cubic root of 131631413 is about 508.6899776053.

Adding to 131631413 its reverse (314136131), we get a palindrome (445767544).

The spelling of 131631413 in words is "one hundred thirty-one million, six hundred thirty-one thousand, four hundred thirteen".