181532452 has 6 divisors (see below), whose sum is σ = 317681798. Its totient is φ = 90766224.

The previous prime is 181532423. The next prime is 181532467. The reversal of 181532452 is 254235181.

It can be written as a sum of positive squares in only one way, i.e., 103103716 + 78428736 = 10154^2 + 8856^2 .

It is a super-2 number, since 2×181532452² = 65908062258264608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22691553 + ... + 22691560.

Almost surely, 2^181532452 is an apocalyptic number.

It is an amenable number.

181532452 is a deficient number, since it is larger than the sum of its proper divisors (136149346).

181532452 is a wasteful number, since it uses less digits than its factorization.

181532452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45383117 (or 45383115 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 181532452 is about 13473.3979381595. The cubic root of 181532452 is about 566.2194165674.

The spelling of 181532452 in words is "one hundred eighty-one million, five hundred thirty-two thousand, four hundred fifty-two".