181051461 has 12 divisors (see below), whose sum is σ = 265102188. Its totient is φ = 119047104.

The previous prime is 181051459. The next prime is 181051483. The reversal of 181051461 is 164150181.

It can be written as a sum of positive squares in 2 ways, for example, as 90611361 + 90440100 = 9519^2 + 9510^2 .

It is not a de Polignac number, because 181051461 - 2¹ = 181051459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181051421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137130 + ... + 138443.

It is an arithmetic number, because the mean of its divisors is an integer number (22091849).

Almost surely, 2^181051461 is an apocalyptic number.

It is an amenable number.

181051461 is a deficient number, since it is larger than the sum of its proper divisors (84050727).

181051461 is a wasteful number, since it uses less digits than its factorization.

181051461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275652 (or 275649 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 181051461 is about 13455.5364441556. The cubic root of 181051461 is about 565.7188865285.

The spelling of 181051461 in words is "one hundred eighty-one million, fifty-one thousand, four hundred sixty-one".