180228921 has 8 divisors (see below), whose sum is σ = 240671424. Its totient is φ = 119969520.

The previous prime is 180228913. The next prime is 180228949. The reversal of 180228921 is 129822081.

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

It is not a de Polignac number, because 180228921 - 2³ = 180228913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180228901) 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, 43461 + ... + 47426.

It is an arithmetic number, because the mean of its divisors is an integer number (30083928).

Almost surely, 2^180228921 is an apocalyptic number.

It is an amenable number.

180228921 is a deficient number, since it is larger than the sum of its proper divisors (60442503).

180228921 is an equidigital number, since it uses as much as digits as its factorization.

180228921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91551.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 180228921 is about 13424.9365361628. The cubic root of 180228921 is about 564.8608747169.

The spelling of 180228921 in words is "one hundred eighty million, two hundred twenty-eight thousand, nine hundred twenty-one".