165261383 has 16 divisors (see below), whose sum is σ = 194320896. Its totient is φ = 137622240.

The previous prime is 165261377. The next prime is 165261389. The reversal of 165261383 is 383162561.

165261383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165261377) and next prime (165261389).

It is not a de Polignac number, because 165261383 - 2¹⁸ = 164999239 is a prime.

It is a super-2 number, since 2×165261383² = 54622649422145378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165261389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33110 + ... + 37772.

It is an arithmetic number, because the mean of its divisors is an integer number (12145056).

Almost surely, 2^165261383 is an apocalyptic number.

165261383 is a deficient number, since it is larger than the sum of its proper divisors (29059513).

165261383 is an equidigital number, since it uses as much as digits as its factorization.

165261383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814.

The product of its digits is 25920, while the sum is 35.

The square root of 165261383 is about 12855.4028719445. The cubic root of 165261383 is about 548.7701257141.

The spelling of 165261383 in words is "one hundred sixty-five million, two hundred sixty-one thousand, three hundred eighty-three".