165751533 has 6 divisors (see below), whose sum is σ = 239418894. Its totient is φ = 110501016.

The previous prime is 165751507. The next prime is 165751567. The reversal of 165751533 is 335157561.

It can be written as a sum of positive squares in only one way, i.e., 165559689 + 191844 = 12867^2 + 438^2 .

It is not a de Polignac number, because 165751533 - 2¹² = 165747437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165751583) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9208410 + ... + 9208427.

It is an arithmetic number, because the mean of its divisors is an integer number (39903149).

Almost surely, 2^165751533 is an apocalyptic number.

It is an amenable number.

165751533 is a deficient number, since it is larger than the sum of its proper divisors (73667361).

165751533 is a wasteful number, since it uses less digits than its factorization.

165751533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416843 (or 18416840 counting only the distinct ones).

The product of its digits is 47250, while the sum is 36.

The square root of 165751533 is about 12874.4527262327. The cubic root of 165751533 is about 549.3121240656.

The spelling of 165751533 in words is "one hundred sixty-five million, seven hundred fifty-one thousand, five hundred thirty-three".