161371571 has 8 divisors (see below), whose sum is σ = 163220640. Its totient is φ = 159530112.

The previous prime is 161371559. The next prime is 161371589. The reversal of 161371571 is 175173161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161371571 - 2¹⁸ = 161109427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161371271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47981 + ... + 51233.

It is an arithmetic number, because the mean of its divisors is an integer number (20402580).

Almost surely, 2^161371571 is an apocalyptic number.

161371571 is a deficient number, since it is larger than the sum of its proper divisors (1849069).

161371571 is a wasteful number, since it uses less digits than its factorization.

161371571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805.

The product of its digits is 4410, while the sum is 32.

The square root of 161371571 is about 12703.2110507541. The cubic root of 161371571 is about 544.4303685549.

The spelling of 161371571 in words is "one hundred sixty-one million, three hundred seventy-one thousand, five hundred seventy-one".