161542447 has 4 divisors (see below), whose sum is σ = 176228136. Its totient is φ = 146856760.

The previous prime is 161542417. The next prime is 161542453. The reversal of 161542447 is 744245161.

161542447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161542447 - 2¹⁹ = 161018159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161542417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7342828 + ... + 7342849.

It is an arithmetic number, because the mean of its divisors is an integer number (44057034).

Almost surely, 2^161542447 is an apocalyptic number.

161542447 is a deficient number, since it is larger than the sum of its proper divisors (14685689).

161542447 is a wasteful number, since it uses less digits than its factorization.

161542447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14685688.

The product of its digits is 26880, while the sum is 34.

The square root of 161542447 is about 12709.9349722963. The cubic root of 161542447 is about 544.6224661384.

The spelling of 161542447 in words is "one hundred sixty-one million, five hundred forty-two thousand, four hundred forty-seven".