165223513 has 16 divisors (see below), whose sum is σ = 212196096. Its totient is φ = 125040960.

The previous prime is 165223489. The next prime is 165223517. The reversal of 165223513 is 315322561.

165223513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165223513 - 2²¹ = 163126361 is a prime.

It is a super-2 number, since 2×165223513² = 54597618496122338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165223517) 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, 37378 + ... + 41563.

It is an arithmetic number, because the mean of its divisors is an integer number (13262256).

Almost surely, 2^165223513 is an apocalyptic number.

165223513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165223513 is a deficient number, since it is larger than the sum of its proper divisors (46972583).

165223513 is a wasteful number, since it uses less digits than its factorization.

165223513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78984.

The product of its digits is 5400, while the sum is 28.

The square root of 165223513 is about 12853.9298659982. The cubic root of 165223513 is about 548.7282052285.

The spelling of 165223513 in words is "one hundred sixty-five million, two hundred twenty-three thousand, five hundred thirteen".