181461223 has 2 divisors, whose sum is σ = 181461224. Its totient is φ = 181461222.

The previous prime is 181461199. The next prime is 181461239. The reversal of 181461223 is 322164181.

181461223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (322164181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181461223 - 2¹³ = 181453031 is a prime.

It is equal to p_10106983 and since 181461223 and 10106983 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 181461191 and 181461200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181461263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90730611 + 90730612.

It is an arithmetic number, because the mean of its divisors is an integer number (90730612).

Almost surely, 2^181461223 is an apocalyptic number.

181461223 is a deficient number, since it is larger than the sum of its proper divisors (1).

181461223 is an equidigital number, since it uses as much as digits as its factorization.

181461223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 181461223 is about 13470.7543589808. The cubic root of 181461223 is about 566.1453498857.

The spelling of 181461223 in words is "one hundred eighty-one million, four hundred sixty-one thousand, two hundred twenty-three".