181145652 has 12 divisors (see below), whose sum is σ = 422673216. Its totient is φ = 60381880.

The previous prime is 181145651. The next prime is 181145711. The reversal of 181145652 is 256541181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181145651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7547724 + ... + 7547747.

It is an arithmetic number, because the mean of its divisors is an integer number (35222768).

Almost surely, 2^181145652 is an apocalyptic number.

181145652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181145652 is an abundant number, since it is smaller than the sum of its proper divisors (241527564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181145652 is a wasteful number, since it uses less digits than its factorization.

181145652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15095478 (or 15095476 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 181145652 is about 13459.0360724682. The cubic root of 181145652 is about 565.8169735392.

The spelling of 181145652 in words is "one hundred eighty-one million, one hundred forty-five thousand, six hundred fifty-two".