161430561 has 12 divisors (see below), whose sum is σ = 235442688. Its totient is φ = 106574904.

The previous prime is 161430551. The next prime is 161430587. The reversal of 161430561 is 165034161.

161430561 is a `hidden beast` number, since 1 + 61 + 43 + 0 + 561 = 666.

161430561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161430561 - 2⁶ = 161430497 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (161430541) 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, 86145 + ... + 87998.

It is an arithmetic number, because the mean of its divisors is an integer number (19620224).

Almost surely, 2^161430561 is an apocalyptic number.

It is an amenable number.

161430561 is a deficient number, since it is larger than the sum of its proper divisors (74012127).

161430561 is a wasteful number, since it uses less digits than its factorization.

161430561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174252 (or 174249 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 161430561 is about 12705.5326924927. The cubic root of 161430561 is about 544.4967000131.

The spelling of 161430561 in words is "one hundred sixty-one million, four hundred thirty thousand, five hundred sixty-one".