181240152 has 16 divisors (see below), whose sum is σ = 453100440. Its totient is φ = 60413376.

The previous prime is 181240133. The next prime is 181240181. The reversal of 181240152 is 251042181.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 7551673 = 181240152 / (1 + 8 + 1 + 2 + 4 + 0 + 1 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3775813 + ... + 3775860.

Almost surely, 2^181240152 is an apocalyptic number.

181240152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181240152 is an abundant number, since it is smaller than the sum of its proper divisors (271860288).

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

181240152 is a wasteful number, since it uses less digits than its factorization.

181240152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551682 (or 7551678 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 181240152 is about 13462.5462673300. The cubic root of 181240152 is about 565.9153481677.

The spelling of 181240152 in words is "one hundred eighty-one million, two hundred forty thousand, one hundred fifty-two".