131285701 has 2 divisors, whose sum is σ = 131285702. Its totient is φ = 131285700.

The previous prime is 131285653. The next prime is 131285779. The reversal of 131285701 is 107582131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120428676 + 10857025 = 10974^2 + 3295^2 .

It is an emirp because it is prime and its reverse (107582131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131285701 - 2¹¹ = 131283653 is a prime.

It is a super-2 number, since 2×131285701² = 34471870574122802, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131285701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131295701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65642850 + 65642851.

It is an arithmetic number, because the mean of its divisors is an integer number (65642851).

Almost surely, 2^131285701 is an apocalyptic number.

It is an amenable number.

131285701 is a deficient number, since it is larger than the sum of its proper divisors (1).

131285701 is an equidigital number, since it uses as much as digits as its factorization.

131285701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 131285701 is about 11457.9972508288. The cubic root of 131285701 is about 508.2442521557.

The spelling of 131285701 in words is "one hundred thirty-one million, two hundred eighty-five thousand, seven hundred one".