161550270 has 96 divisors (see below), whose sum is σ = 483537600. Its totient is φ = 36656640.

The previous prime is 161550239. The next prime is 161550353. The reversal of 161550270 is 72055161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93010 + ... + 94730.

It is an arithmetic number, because the mean of its divisors is an integer number (5036850).

Almost surely, 2^161550270 is an apocalyptic number.

161550270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161550270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241768800).

161550270 is an abundant number, since it is smaller than the sum of its proper divisors (321987330).

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

161550270 is a wasteful number, since it uses less digits than its factorization.

161550270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 161550270 is about 12710.2427199483. The cubic root of 161550270 is about 544.6312574558.

The spelling of 161550270 in words is "one hundred sixty-one million, five hundred fifty thousand, two hundred seventy".