181056497 has 2 divisors, whose sum is σ = 181056498. Its totient is φ = 181056496.

The previous prime is 181056487. The next prime is 181056509. The reversal of 181056497 is 794650181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159163456 + 21893041 = 12616^2 + 4679^2 .

It is a cyclic number.

It is not a de Polignac number, because 181056497 - 2⁴ = 181056481 is a prime.

It is a super-2 number, since 2×181056497² = 65562910211822018, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (181056457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90528248 + 90528249.

It is an arithmetic number, because the mean of its divisors is an integer number (90528249).

Almost surely, 2^181056497 is an apocalyptic number.

It is an amenable number.

181056497 is a deficient number, since it is larger than the sum of its proper divisors (1).

181056497 is an equidigital number, since it uses as much as digits as its factorization.

181056497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 181056497 is about 13455.7235777196. The cubic root of 181056497 is about 565.7241316926.

The spelling of 181056497 in words is "one hundred eighty-one million, fifty-six thousand, four hundred ninety-seven".