131625161 has 2 divisors, whose sum is σ = 131625162. Its totient is φ = 131625160.

The previous prime is 131625149. The next prime is 131625209. The reversal of 131625161 is 161526131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84290761 + 47334400 = 9181^2 + 6880^2 .

It is a cyclic number.

It is not a de Polignac number, because 131625161 - 2¹⁰ = 131624137 is a prime.

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 131625161.

It is not a weakly prime, because it can be changed into another prime (131625061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65812580 + 65812581.

It is an arithmetic number, because the mean of its divisors is an integer number (65812581).

Almost surely, 2^131625161 is an apocalyptic number.

It is an amenable number.

131625161 is a deficient number, since it is larger than the sum of its proper divisors (1).

131625161 is an equidigital number, since it uses as much as digits as its factorization.

131625161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 131625161 is about 11472.8009221811. The cubic root of 131625161 is about 508.6819238538.

The spelling of 131625161 in words is "one hundred thirty-one million, six hundred twenty-five thousand, one hundred sixty-one".