151566165 has 24 divisors (see below), whose sum is σ = 264246840. Its totient is φ = 80363904.

The previous prime is 151566143. The next prime is 151566193. The reversal of 151566165 is 561665151.

It can be written as a sum of positive squares in 4 ways, for example, as 34082244 + 117483921 = 5838^2 + 10839^2 .

It is not a de Polignac number, because 151566165 - 2²¹ = 149469013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1950 + ... + 17519.

It is an arithmetic number, because the mean of its divisors is an integer number (11010285).

Almost surely, 2^151566165 is an apocalyptic number.

151566165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

151566165 is a deficient number, since it is larger than the sum of its proper divisors (112680675).

151566165 is a wasteful number, since it uses less digits than its factorization.

151566165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19653 (or 19650 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 151566165 is about 12311.2211010931. The cubic root of 151566165 is about 533.1721064309.

It can be divided in two parts, 15156 and 6165, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 151566165 in words is "one hundred fifty-one million, five hundred sixty-six thousand, one hundred sixty-five".