165241031 has 2 divisors, whose sum is σ = 165241032. Its totient is φ = 165241030.

The previous prime is 165241019. The next prime is 165241079. The reversal of 165241031 is 130142561.

165241031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165241031 - 2¹⁸ = 164978887 is a prime.

It is a super-2 number, since 2×165241031² = 54609196651885922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 165240988 and 165241006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165241091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82620515 + 82620516.

It is an arithmetic number, because the mean of its divisors is an integer number (82620516).

Almost surely, 2^165241031 is an apocalyptic number.

165241031 is a deficient number, since it is larger than the sum of its proper divisors (1).

165241031 is an equidigital number, since it uses as much as digits as its factorization.

165241031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 165241031 is about 12854.6112737803. The cubic root of 165241031 is about 548.7475977085.

Adding to 165241031 its reverse (130142561), we get a palindrome (295383592).

The spelling of 165241031 in words is "one hundred sixty-five million, two hundred forty-one thousand, thirty-one".