131011229 has 2 divisors, whose sum is σ = 131011230. Its totient is φ = 131011228.

The previous prime is 131011201. The next prime is 131011247. The reversal of 131011229 is 922110131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130759225 + 252004 = 11435^2 + 502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131011229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131011229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131011249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65505614 + 65505615.

It is an arithmetic number, because the mean of its divisors is an integer number (65505615).

Almost surely, 2^131011229 is an apocalyptic number.

It is an amenable number.

131011229 is a deficient number, since it is larger than the sum of its proper divisors (1).

131011229 is an equidigital number, since it uses as much as digits as its factorization.

131011229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 131011229 is about 11446.0136728907. The cubic root of 131011229 is about 507.8898186756.

The spelling of 131011229 in words is "one hundred thirty-one million, eleven thousand, two hundred twenty-nine".