161452197 has 10 divisors (see below), whose sum is σ = 241181798. Its totient is φ = 107634744.

The previous prime is 161452183. The next prime is 161452199. The reversal of 161452197 is 791254161.

161452197 is a `hidden beast` number, since 16 + 1 + 452 + 197 = 666.

161452197 is digitally balanced in base 2, 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., 104162436 + 57289761 = 10206^2 + 7569^2 .

It is not a de Polignac number, because 161452197 - 2⁶ = 161452133 is a prime.

It is a super-3 number, since 3×161452197³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161452199) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 996538 + ... + 996699.

Almost surely, 2^161452197 is an apocalyptic number.

It is an amenable number.

161452197 is a deficient number, since it is larger than the sum of its proper divisors (79729601).

161452197 is an equidigital number, since it uses as much as digits as its factorization.

161452197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993249 (or 1993240 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 161452197 is about 12706.3841040636. The cubic root of 161452197 is about 544.5210246190.

The spelling of 161452197 in words is "one hundred sixty-one million, four hundred fifty-two thousand, one hundred ninety-seven".