180311421 has 16 divisors (see below), whose sum is σ = 251559936. Its totient is φ = 114664176.

The previous prime is 180311389. The next prime is 180311423. The reversal of 180311421 is 124113081.

It is a happy number.

It is not a de Polignac number, because 180311421 - 2⁵ = 180311389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180311423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23016 + ... + 29838.

It is an arithmetic number, because the mean of its divisors is an integer number (15722496).

Almost surely, 2^180311421 is an apocalyptic number.

It is an amenable number.

180311421 is a deficient number, since it is larger than the sum of its proper divisors (71248515).

180311421 is a wasteful number, since it uses less digits than its factorization.

180311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 180311421 is about 13428.0088248407. The cubic root of 180311421 is about 564.9470501453.

The spelling of 180311421 in words is "one hundred eighty million, three hundred eleven thousand, four hundred twenty-one".