161022852 has 18 divisors (see below), whose sum is σ = 407030078. Its totient is φ = 53674272.

The previous prime is 161022847. The next prime is 161022863. The reversal of 161022852 is 258220161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 151437636 + 9585216 = 12306^2 + 3096^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2236393 + ... + 2236464.

Almost surely, 2^161022852 is an apocalyptic number.

161022852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161022852 is an abundant number, since it is smaller than the sum of its proper divisors (246007226).

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

161022852 is a wasteful number, since it uses less digits than its factorization.

161022852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472867 (or 4472862 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 161022852 is about 12689.4780034484. The cubic root of 161022852 is about 544.0379199706.

The spelling of 161022852 in words is "one hundred sixty-one million, twenty-two thousand, eight hundred fifty-two".