181549053 has 64 divisors (see below), whose sum is σ = 319334400. Its totient is φ = 99792000.

The previous prime is 181549021. The next prime is 181549057. The reversal of 181549053 is 350945181.

It is not a de Polignac number, because 181549053 - 2⁵ = 181549021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181548999 and 181549017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181549057) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 723178 + ... + 723428.

It is an arithmetic number, because the mean of its divisors is an integer number (4989600).

Almost surely, 2^181549053 is an apocalyptic number.

It is an amenable number.

181549053 is a deficient number, since it is larger than the sum of its proper divisors (137785347).

181549053 is a wasteful number, since it uses less digits than its factorization.

181549053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 181549053 is about 13474.0139898992. The cubic root of 181549053 is about 566.2366761481.

The spelling of 181549053 in words is "one hundred eighty-one million, five hundred forty-nine thousand, fifty-three".