161285226 has 24 divisors (see below), whose sum is σ = 330650592. Its totient is φ = 52447200.

The previous prime is 161285209. The next prime is 161285227. The reversal of 161285226 is 622582161.

It is not an unprimeable number, because it can be changed into a prime (161285227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2091 + ... + 18081.

It is an arithmetic number, because the mean of its divisors is an integer number (13777108).

Almost surely, 2^161285226 is an apocalyptic number.

161285226 is an abundant number, since it is smaller than the sum of its proper divisors (169365366).

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

161285226 is a wasteful number, since it uses less digits than its factorization.

161285226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16078 (or 16037 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 161285226 is about 12699.8120458533. The cubic root of 161285226 is about 544.3332485424. Note that the first 3 decimals are identical.

The spelling of 161285226 in words is "one hundred sixty-one million, two hundred eighty-five thousand, two hundred twenty-six".