165253931 has 2 divisors, whose sum is σ = 165253932. Its totient is φ = 165253930.

The previous prime is 165253909. The next prime is 165253937. The reversal of 165253931 is 139352561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165253931 - 2¹⁸ = 164991787 is a prime.

It is a super-2 number, since 2×165253931² = 54617723421905522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165253891 and 165253900.

It is not a weakly prime, because it can be changed into another prime (165253937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82626965 + 82626966.

It is an arithmetic number, because the mean of its divisors is an integer number (82626966).

Almost surely, 2^165253931 is an apocalyptic number.

165253931 is a deficient number, since it is larger than the sum of its proper divisors (1).

165253931 is an equidigital number, since it uses as much as digits as its factorization.

165253931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 35.

The square root of 165253931 is about 12855.1130294525. The cubic root of 165253931 is about 548.7618771720.

The spelling of 165253931 in words is "one hundred sixty-five million, two hundred fifty-three thousand, nine hundred thirty-one".