161143051 has 4 divisors (see below), whose sum is σ = 170622072. Its totient is φ = 151664032.

The previous prime is 161143049. The next prime is 161143057. The reversal of 161143051 is 150341161.

161143051 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 161143051 - 2¹ = 161143049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161143057) 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, 4739485 + ... + 4739518.

It is an arithmetic number, because the mean of its divisors is an integer number (42655518).

Almost surely, 2^161143051 is an apocalyptic number.

161143051 is a deficient number, since it is larger than the sum of its proper divisors (9479021).

161143051 is an equidigital number, since it uses as much as digits as its factorization.

161143051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479020.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 161143051 is about 12694.2132879513. The cubic root of 161143051 is about 544.1732559360.

The spelling of 161143051 in words is "one hundred sixty-one million, one hundred forty-three thousand, fifty-one".