381116151 has 16 divisors (see below), whose sum is σ = 608049120. Its totient is φ = 234532800.

The previous prime is 381116147. The next prime is 381116159. The reversal of 381116151 is 151611183.

It is a happy number.

381116151 is a `hidden beast` number, since 38 + 1 + 11 + 615 + 1 = 666.

It is not a de Polignac number, because 381116151 - 2² = 381116147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381116159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 542550 + ... + 543251.

It is an arithmetic number, because the mean of its divisors is an integer number (38003070).

Almost surely, 2^381116151 is an apocalyptic number.

381116151 is a deficient number, since it is larger than the sum of its proper divisors (226932969).

381116151 is a wasteful number, since it uses less digits than its factorization.

381116151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085823 (or 1085817 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 381116151 is about 19522.1963672124. The cubic root of 381116151 is about 725.0241139819.

The spelling of 381116151 in words is "three hundred eighty-one million, one hundred sixteen thousand, one hundred fifty-one".