165542290 has 8 divisors (see below), whose sum is σ = 297976140. Its totient is φ = 66216912.

The previous prime is 165542287. The next prime is 165542317. The reversal of 165542290 is 92245561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 134861769 + 30680521 = 11613^2 + 5539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8277105 + ... + 8277124.

Almost surely, 2^165542290 is an apocalyptic number.

165542290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165542290 is a deficient number, since it is larger than the sum of its proper divisors (132433850).

165542290 is a wasteful number, since it uses less digits than its factorization.

165542290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16554236.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 165542290 is about 12866.3238728084. The cubic root of 165542290 is about 549.0808781059.

The spelling of 165542290 in words is "one hundred sixty-five million, five hundred forty-two thousand, two hundred ninety".