165221132235513 has 16 divisors (see below), whose sum is σ = 231891617659200. Its totient is φ = 104349149614080.

The previous prime is 165221132235499. The next prime is 165221132235527. The reversal of 165221132235513 is 315532231122561.

165221132235513 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 (165221132235499) and next prime (165221132235527).

It is not a de Polignac number, because 165221132235513 - 2¹³ = 165221132227321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165221132235613) 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, 8638648 + ... + 20126313.

It is an arithmetic number, because the mean of its divisors is an integer number (14493226103700).

Almost surely, 2^{165221132235513} is an apocalyptic number.

It is an amenable number.

165221132235513 is a deficient number, since it is larger than the sum of its proper divisors (66670485423687).

165221132235513 is a wasteful number, since it uses less digits than its factorization.

165221132235513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28865752.

The product of its digits is 324000, while the sum is 42.

The spelling of 165221132235513 in words is "one hundred sixty-five trillion, two hundred twenty-one billion, one hundred thirty-two million, two hundred thirty-five thousand, five hundred thirteen".