181464533 has 2 divisors, whose sum is σ = 181464534. Its totient is φ = 181464532.

The previous prime is 181464529. The next prime is 181464541. The reversal of 181464533 is 335464181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174055249 + 7409284 = 13193^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 181464533 - 2² = 181464529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181464493 and 181464502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181464433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90732266 + 90732267.

It is an arithmetic number, because the mean of its divisors is an integer number (90732267).

Almost surely, 2^181464533 is an apocalyptic number.

It is an amenable number.

181464533 is a deficient number, since it is larger than the sum of its proper divisors (1).

181464533 is an equidigital number, since it uses as much as digits as its factorization.

181464533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 181464533 is about 13470.8772171674. The cubic root of 181464533 is about 566.1487921817.

The spelling of 181464533 in words is "one hundred eighty-one million, four hundred sixty-four thousand, five hundred thirty-three".