181552152 has 16 divisors (see below), whose sum is σ = 453880440. Its totient is φ = 60517376.

The previous prime is 181552127. The next prime is 181552157. The reversal of 181552152 is 251255181.

It is a super-2 number, since 2×181552152² = 65922367791662208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181552157) 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, 3782313 + ... + 3782360.

Almost surely, 2^181552152 is an apocalyptic number.

181552152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181552152 is an abundant number, since it is smaller than the sum of its proper divisors (272328288).

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

181552152 is a wasteful number, since it uses less digits than its factorization.

181552152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7564682 (or 7564678 counting only the distinct ones).

The product of its digits is 4000, while the sum is 30.

The square root of 181552152 is about 13474.1289885469. The cubic root of 181552152 is about 566.2398979724.

The spelling of 181552152 in words is "one hundred eighty-one million, five hundred fifty-two thousand, one hundred fifty-two".