187216144 has 20 divisors (see below), whose sum is σ = 363025996. Its totient is φ = 93532032.

The previous prime is 187216129. The next prime is 187216147. The reversal of 187216144 is 441612781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 167961600 + 19254544 = 12960^2 + 4388^2 .

It is not an unprimeable number, because it can be changed into a prime (187216147) 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, 19222 + ... + 27274.

Almost surely, 2^187216144 is an apocalyptic number.

It is an amenable number.

187216144 is a deficient number, since it is larger than the sum of its proper divisors (175809852).

187216144 is a wasteful number, since it uses less digits than its factorization.

187216144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514 (or 9508 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 187216144 is about 13682.6950561649. The cubic root of 187216144 is about 572.0681451731.

The spelling of 187216144 in words is "one hundred eighty-seven million, two hundred sixteen thousand, one hundred forty-four".