165253730 has 32 divisors (see below), whose sum is σ = 305895744. Its totient is φ = 64241856.

The previous prime is 165253727. The next prime is 165253733. The reversal of 165253730 is 37352561.

It is an interprime number because it is at equal distance from previous prime (165253727) and next prime (165253733).

It is not an unprimeable number, because it can be changed into a prime (165253733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96764 + ... + 98456.

It is an arithmetic number, because the mean of its divisors is an integer number (9559242).

Almost surely, 2^165253730 is an apocalyptic number.

165253730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165253730 is a deficient number, since it is larger than the sum of its proper divisors (140642014).

165253730 is a wasteful number, since it uses less digits than its factorization.

165253730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 165253730 is about 12855.1052115492. The cubic root of 165253730 is about 548.7616546837.

The spelling of 165253730 in words is "one hundred sixty-five million, two hundred fifty-three thousand, seven hundred thirty".