165151233 has 24 divisors (see below), whose sum is σ = 261758952. Its totient is φ = 99710208.

The previous prime is 165151199. The next prime is 165151237. The reversal of 165151233 is 332151561.

165151233 is a `hidden beast` number, since 1 + 651 + 5 + 1 + 2 + 3 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61355889 + 103795344 = 7833^2 + 10188^2 .

It is not a de Polignac number, because 165151233 - 2¹⁸ = 164889089 is a prime.

It is a super-2 number, since 2×165151233² = 54549859522840578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165151197 and 165151206.

It is not an unprimeable number, because it can be changed into a prime (165151237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7116 + ... + 19517.

It is an arithmetic number, because the mean of its divisors is an integer number (10906623).

Almost surely, 2^165151233 is an apocalyptic number.

165151233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165151233 is a deficient number, since it is larger than the sum of its proper divisors (96607719).

165151233 is a wasteful number, since it uses less digits than its factorization.

165151233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26705 (or 26702 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 165151233 is about 12851.1179669319. The cubic root of 165151233 is about 548.6481765470.

The spelling of 165151233 in words is "one hundred sixty-five million, one hundred fifty-one thousand, two hundred thirty-three".