181140552 has 48 divisors (see below), whose sum is σ = 492794640. Its totient is φ = 60108768.

The previous prime is 181140551. The next prime is 181140563. The reversal of 181140552 is 255041181.

It is not an unprimeable number, because it can be changed into a prime (181140551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10803 + ... + 21885.

It is an arithmetic number, because the mean of its divisors is an integer number (10266555).

Almost surely, 2^181140552 is an apocalyptic number.

181140552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181140552 is an abundant number, since it is smaller than the sum of its proper divisors (311654088).

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

181140552 is a wasteful number, since it uses less digits than its factorization.

181140552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11322 (or 11315 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 181140552 is about 13458.8466073434. The cubic root of 181140552 is about 565.8116634593.

The spelling of 181140552 in words is "one hundred eighty-one million, one hundred forty thousand, five hundred fifty-two".