165860131 has 2 divisors, whose sum is σ = 165860132. Its totient is φ = 165860130.

The previous prime is 165860119. The next prime is 165860141. The reversal of 165860131 is 131068561.

165860131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165860131 - 2¹⁹ = 165335843 is a prime.

It is a super-2 number, since 2×165860131² = 55019166110674322, which contains 22 as substring.

It is equal to p_9284251 and since 165860131 and 9284251 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 165860093 and 165860102.

It is not a weakly prime, because it can be changed into another prime (165860141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82930065 + 82930066.

It is an arithmetic number, because the mean of its divisors is an integer number (82930066).

Almost surely, 2^165860131 is an apocalyptic number.

165860131 is a deficient number, since it is larger than the sum of its proper divisors (1).

165860131 is an equidigital number, since it uses as much as digits as its factorization.

165860131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 165860131 is about 12878.6696129686. The cubic root of 165860131 is about 549.4320649867.

The spelling of 165860131 in words is "one hundred sixty-five million, eight hundred sixty thousand, one hundred thirty-one".