161053109 has 4 divisors (see below), whose sum is σ = 184060704. Its totient is φ = 138045516.

The previous prime is 161053097. The next prime is 161053141. The reversal of 161053109 is 901350161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 901350161 = 47 ⋅19177663.

It is not a de Polignac number, because 161053109 - 2¹⁶ = 160987573 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 (161053159) 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, 11503787 + ... + 11503800.

It is an arithmetic number, because the mean of its divisors is an integer number (46015176).

Almost surely, 2^161053109 is an apocalyptic number.

It is an amenable number.

161053109 is a deficient number, since it is larger than the sum of its proper divisors (23007595).

161053109 is an equidigital number, since it uses as much as digits as its factorization.

161053109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23007594.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 161053109 is about 12690.6701556695. The cubic root of 161053109 is about 544.0719936527.

The spelling of 161053109 in words is "one hundred sixty-one million, fifty-three thousand, one hundred nine".