161023471 has 4 divisors (see below), whose sum is σ = 184026832. Its totient is φ = 138020112.

The previous prime is 161023459. The next prime is 161023477. The reversal of 161023471 is 174320161.

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 161023471 - 2²⁵ = 127469039 is a prime.

It is a super-3 number, since 3×161023471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161023477) 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, 11501670 + ... + 11501683.

It is an arithmetic number, because the mean of its divisors is an integer number (46006708).

Almost surely, 2^161023471 is an apocalyptic number.

161023471 is a deficient number, since it is larger than the sum of its proper divisors (23003361).

161023471 is an equidigital number, since it uses as much as digits as its factorization.

161023471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23003360.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 161023471 is about 12689.5023937111. The cubic root of 161023471 is about 544.0386170953.

The spelling of 161023471 in words is "one hundred sixty-one million, twenty-three thousand, four hundred seventy-one".