165303512197 has 4 divisors (see below), whose sum is σ = 165305601900. Its totient is φ = 165301422496.

The previous prime is 165303512189. The next prime is 165303512237. The reversal of 165303512197 is 791215303561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791215303561 = 151121 ⋅5235641.

It can be written as a sum of positive squares in 2 ways, for example, as 53960502436 + 111343009761 = 232294^2 + 333681^2 .

It is a cyclic number.

It is not a de Polignac number, because 165303512197 - 2³ = 165303512189 is a prime.

It is a super-2 number, since 2×165303512197² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165303513197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921328 + ... + 1086025.

It is an arithmetic number, because the mean of its divisors is an integer number (41326400475).

Almost surely, 2^165303512197 is an apocalyptic number.

It is an amenable number.

165303512197 is a deficient number, since it is larger than the sum of its proper divisors (2089703).

165303512197 is an equidigital number, since it uses as much as digits as its factorization.

165303512197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089702.

The product of its (nonzero) digits is 170100, while the sum is 43.

The spelling of 165303512197 in words is "one hundred sixty-five billion, three hundred three million, five hundred twelve thousand, one hundred ninety-seven".