161566052 has 6 divisors (see below), whose sum is σ = 282740598. Its totient is φ = 80783024.

The previous prime is 161566051. The next prime is 161566073. The reversal of 161566052 is 250665161.

161566052 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 109956196 + 51609856 = 10486^2 + 7184^2 .

It is a super-2 number, since 2×161566052² = 52207178317733408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161566051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20195753 + ... + 20195760.

It is an arithmetic number, because the mean of its divisors is an integer number (47123433).

Almost surely, 2^161566052 is an apocalyptic number.

It is an amenable number.

161566052 is a deficient number, since it is larger than the sum of its proper divisors (121174546).

161566052 is a wasteful number, since it uses less digits than its factorization.

161566052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40391517 (or 40391515 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 161566052 is about 12710.8635426552. The cubic root of 161566052 is about 544.6489920607.

The spelling of 161566052 in words is "one hundred sixty-one million, five hundred sixty-six thousand, fifty-two".