165531455 has 16 divisors (see below), whose sum is σ = 202914720. Its totient is φ = 129587328.

The previous prime is 165531427. The next prime is 165531463. The reversal of 165531455 is 554135561.

It is a cyclic number.

It is not a de Polignac number, because 165531455 - 2¹² = 165527359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161936 + ... + 162954.

It is an arithmetic number, because the mean of its divisors is an integer number (12682170).

Almost surely, 2^165531455 is an apocalyptic number.

165531455 is a deficient number, since it is larger than the sum of its proper divisors (37383265).

165531455 is a wasteful number, since it uses less digits than its factorization.

165531455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690.

The product of its digits is 45000, while the sum is 35.

The square root of 165531455 is about 12865.9028054777. The cubic root of 165531455 is about 549.0688984458.

The spelling of 165531455 in words is "one hundred sixty-five million, five hundred thirty-one thousand, four hundred fifty-five".