165511012 has 12 divisors (see below), whose sum is σ = 290634876. Its totient is φ = 82472480.

The previous prime is 165510991. The next prime is 165511039. The reversal of 165511012 is 210115561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 79281216 + 86229796 = 8904^2 + 9286^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69439 + ... + 71782.

It is an arithmetic number, because the mean of its divisors is an integer number (24219573).

Almost surely, 2^165511012 is an apocalyptic number.

It is an amenable number.

165511012 is a deficient number, since it is larger than the sum of its proper divisors (125123864).

165511012 is a wasteful number, since it uses less digits than its factorization.

165511012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141518 (or 141516 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 165511012 is about 12865.1083166835. The cubic root of 165511012 is about 549.0462943278.

Adding to 165511012 its reverse (210115561), we get a palindrome (375626573).

The spelling of 165511012 in words is "one hundred sixty-five million, five hundred eleven thousand, twelve".