165486931 has 2 divisors, whose sum is σ = 165486932. Its totient is φ = 165486930.

The previous prime is 165486913. The next prime is 165486943. The reversal of 165486931 is 139684561.

165486931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (165486913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165486931 - 2⁷ = 165486803 is a prime.

It is a super-2 number, since 2×165486931² = 54771848663597522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165486911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82743465 + 82743466.

It is an arithmetic number, because the mean of its divisors is an integer number (82743466).

Almost surely, 2^165486931 is an apocalyptic number.

165486931 is a deficient number, since it is larger than the sum of its proper divisors (1).

165486931 is an equidigital number, since it uses as much as digits as its factorization.

165486931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 165486931 is about 12864.1723791311. The cubic root of 165486931 is about 549.0196652334.

The spelling of 165486931 in words is "one hundred sixty-five million, four hundred eighty-six thousand, nine hundred thirty-one".