381361213 has 4 divisors (see below), whose sum is σ = 390662748. Its totient is φ = 372059680.

The previous prime is 381361181. The next prime is 381361219. The reversal of 381361213 is 312163183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312163183 = 8803 ⋅35461.

It can be written as a sum of positive squares in 2 ways, for example, as 121925764 + 259435449 = 11042^2 + 16107^2 .

It is a cyclic number.

It is not a de Polignac number, because 381361213 - 2⁵ = 381361181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381361219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4650706 + ... + 4650787.

It is an arithmetic number, because the mean of its divisors is an integer number (97665687).

Almost surely, 2^381361213 is an apocalyptic number.

It is an amenable number.

381361213 is a deficient number, since it is larger than the sum of its proper divisors (9301535).

381361213 is an equidigital number, since it uses as much as digits as its factorization.

381361213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9301534.

The product of its digits is 2592, while the sum is 28.

The square root of 381361213 is about 19528.4718552169. The cubic root of 381361213 is about 725.1794802572.

The spelling of 381361213 in words is "three hundred eighty-one million, three hundred sixty-one thousand, two hundred thirteen".