165115457 has 8 divisors (see below), whose sum is σ = 178233384. Its totient is φ = 152057088.

The previous prime is 165115429. The next prime is 165115463. The reversal of 165115457 is 754511561.

It can be written as a sum of positive squares in 4 ways, for example, as 3418801 + 161696656 = 1849^2 + 12716^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165115457 - 2¹⁴ = 165099073 is a prime.

It is a super-2 number, since 2×165115457² = 54526228280637698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165115417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9038 + ... + 20295.

It is an arithmetic number, because the mean of its divisors is an integer number (22279173).

Almost surely, 2^165115457 is an apocalyptic number.

It is an amenable number.

165115457 is a deficient number, since it is larger than the sum of its proper divisors (13117927).

165115457 is a wasteful number, since it uses less digits than its factorization.

165115457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29779.

The product of its digits is 21000, while the sum is 35.

The square root of 165115457 is about 12849.7259503851. The cubic root of 165115457 is about 548.6085565891.

The spelling of 165115457 in words is "one hundred sixty-five million, one hundred fifteen thousand, four hundred fifty-seven".