161330550 has 24 divisors (see below), whose sum is σ = 400100136. Its totient is φ = 43021440.

The previous prime is 161330483. The next prime is 161330551. The reversal of 161330550 is 55033161.

It is a self number, because there is not a number n which added to its sum of digits gives 161330550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161330551) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 537619 + ... + 537918.

It is an arithmetic number, because the mean of its divisors is an integer number (16670839).

Almost surely, 2^161330550 is an apocalyptic number.

161330550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161330550 is an abundant number, since it is smaller than the sum of its proper divisors (238769586).

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

161330550 is a wasteful number, since it uses less digits than its factorization.

161330550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075552 (or 1075547 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 161330550 is about 12701.5963563640. The cubic root of 161330550 is about 544.3842328557.

The spelling of 161330550 in words is "one hundred sixty-one million, three hundred thirty thousand, five hundred fifty".