181226481 has 16 divisors (see below), whose sum is σ = 256728000. Its totient is φ = 113496768.

The previous prime is 181226459. The next prime is 181226489. The reversal of 181226481 is 184622181.

It is not a de Polignac number, because 181226481 - 2⁶ = 181226417 is a prime.

It is a super-2 number, since 2×181226481² = 65686074831286722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181226489) 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, 24931 + ... + 31368.

It is an arithmetic number, because the mean of its divisors is an integer number (16045500).

Almost surely, 2^181226481 is an apocalyptic number.

It is an amenable number.

181226481 is a deficient number, since it is larger than the sum of its proper divisors (75501519).

181226481 is a wasteful number, since it uses less digits than its factorization.

181226481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56368.

The product of its digits is 6144, while the sum is 33.

The square root of 181226481 is about 13462.0385157672. The cubic root of 181226481 is about 565.9011187541.

The spelling of 181226481 in words is "one hundred eighty-one million, two hundred twenty-six thousand, four hundred eighty-one".