180464221 has 4 divisors (see below), whose sum is σ = 206244832. Its totient is φ = 154683612.

The previous prime is 180464213. The next prime is 180464257. The reversal of 180464221 is 122464081.

180464221 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, 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: 122464081 = 499 ⋅245419.

It is a cyclic number.

It is not a de Polignac number, because 180464221 - 2³ = 180464213 is a prime.

It is a super-2 number, since 2×180464221² = 65134670122273682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 180464221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180464201) 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, 12890295 + ... + 12890308.

It is an arithmetic number, because the mean of its divisors is an integer number (51561208).

Almost surely, 2^180464221 is an apocalyptic number.

It is an amenable number.

180464221 is a deficient number, since it is larger than the sum of its proper divisors (25780611).

180464221 is an equidigital number, since it uses as much as digits as its factorization.

180464221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25780610.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 180464221 is about 13433.6972200508. The cubic root of 180464221 is about 565.1065880825.

The spelling of 180464221 in words is "one hundred eighty million, four hundred sixty-four thousand, two hundred twenty-one".