131234161 has 2 divisors, whose sum is σ = 131234162. Its totient is φ = 131234160.

The previous prime is 131234143. The next prime is 131234171. The reversal of 131234161 is 161432131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115433536 + 15800625 = 10744^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 131234161 - 2¹¹ = 131232113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131234141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65617080 + 65617081.

It is an arithmetic number, because the mean of its divisors is an integer number (65617081).

Almost surely, 2^131234161 is an apocalyptic number.

It is an amenable number.

131234161 is a deficient number, since it is larger than the sum of its proper divisors (1).

131234161 is an equidigital number, since it uses as much as digits as its factorization.

131234161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

The square root of 131234161 is about 11455.7479459003. The cubic root of 131234161 is about 508.1777347890.

Adding to 131234161 its reverse (161432131), we get a palindrome (292666292).

The spelling of 131234161 in words is "one hundred thirty-one million, two hundred thirty-four thousand, one hundred sixty-one".