161443461 has 4 divisors (see below), whose sum is σ = 215257952. Its totient is φ = 107628972.

The previous prime is 161443453. The next prime is 161443481. The reversal of 161443461 is 164344161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161443461 - 2³ = 161443453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161443481) 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, 26907241 + ... + 26907246.

It is an arithmetic number, because the mean of its divisors is an integer number (53814488).

Almost surely, 2^161443461 is an apocalyptic number.

It is an amenable number.

161443461 is a deficient number, since it is larger than the sum of its proper divisors (53814491).

161443461 is an equidigital number, since it uses as much as digits as its factorization.

161443461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53814490.

The product of its digits is 6912, while the sum is 30.

The square root of 161443461 is about 12706.0403352107. The cubic root of 161443461 is about 544.5112032982.

The spelling of 161443461 in words is "one hundred sixty-one million, four hundred forty-three thousand, four hundred sixty-one".