165150531 has 36 divisors (see below), whose sum is σ = 298854192. Its totient is φ = 87109344.

The previous prime is 165150497. The next prime is 165150553. The reversal of 165150531 is 135051561.

165150531 is a `hidden beast` number, since 1 + 651 + 5 + 0 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 165150531 - 2⁶ = 165150467 is a prime.

It is a super-2 number, since 2×165150531² = 54549395779163922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165150495 and 165150504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165150581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8671 + ... + 20136.

Almost surely, 2^165150531 is an apocalyptic number.

165150531 is a deficient number, since it is larger than the sum of its proper divisors (133703661).

165150531 is a wasteful number, since it uses less digits than its factorization.

165150531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28840 (or 28830 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 165150531 is about 12851.0906541040. The cubic root of 165150531 is about 548.6473991755.

The spelling of 165150531 in words is "one hundred sixty-five million, one hundred fifty thousand, five hundred thirty-one".