381155216 has 20 divisors (see below), whose sum is σ = 795295452. Its totient is φ = 175917696.

The previous prime is 381155213. The next prime is 381155231. The reversal of 381155216 is 612551183.

It can be written as a sum of positive squares in 2 ways, for example, as 159264400 + 221890816 = 12620^2 + 14896^2 .

It is not an unprimeable number, because it can be changed into a prime (381155213) 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, 916031 + ... + 916446.

Almost surely, 2^381155216 is an apocalyptic number.

It is an amenable number.

381155216 is an abundant number, since it is smaller than the sum of its proper divisors (414140236).

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

381155216 is a wasteful number, since it uses less digits than its factorization.

381155216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832498 (or 1832492 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The square root of 381155216 is about 19523.1968693654. The cubic root of 381155216 is about 725.0488851698.

The spelling of 381155216 in words is "three hundred eighty-one million, one hundred fifty-five thousand, two hundred sixteen".