181024421 has 16 divisors (see below), whose sum is σ = 192412800. Its totient is φ = 169963200.

The previous prime is 181024391. The next prime is 181024427. The reversal of 181024421 is 124420181.

181024421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 181024421 - 2¹⁰ = 181023397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181024427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345866 + ... + 346388.

It is an arithmetic number, because the mean of its divisors is an integer number (12025800).

Almost surely, 2^181024421 is an apocalyptic number.

It is an amenable number.

181024421 is a deficient number, since it is larger than the sum of its proper divisors (11388379).

181024421 is a wasteful number, since it uses less digits than its factorization.

181024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 181024421 is about 13454.5316157791. The cubic root of 181024421 is about 565.6907217916.

The spelling of 181024421 in words is "one hundred eighty-one million, twenty-four thousand, four hundred twenty-one".