165622540 has 24 divisors (see below), whose sum is σ = 362930400. Its totient is φ = 63368448.

The previous prime is 165622537. The next prime is 165622543. The reversal of 165622540 is 45226561.

It is an interprime number because it is at equal distance from previous prime (165622537) and next prime (165622543).

It is not an unprimeable number, because it can be changed into a prime (165622543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179565 + ... + 180484.

It is an arithmetic number, because the mean of its divisors is an integer number (15122100).

Almost surely, 2^165622540 is an apocalyptic number.

165622540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165622540 is an abundant number, since it is smaller than the sum of its proper divisors (197307860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165622540 is a wasteful number, since it uses less digits than its factorization.

165622540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360081 (or 360079 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 165622540 is about 12869.4421013500. The cubic root of 165622540 is about 549.1695898225.

The spelling of 165622540 in words is "one hundred sixty-five million, six hundred twenty-two thousand, five hundred forty".