381222755 has 4 divisors (see below), whose sum is σ = 457467312. Its totient is φ = 304978200.

The previous prime is 381222731. The next prime is 381222761. The reversal of 381222755 is 557222183.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 381222755 - 2¹⁸ = 380960611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38122271 + ... + 38122280.

It is an arithmetic number, because the mean of its divisors is an integer number (114366828).

Almost surely, 2^381222755 is an apocalyptic number.

381222755 is a deficient number, since it is larger than the sum of its proper divisors (76244557).

381222755 is an equidigital number, since it uses as much as digits as its factorization.

381222755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76244556.

The product of its digits is 33600, while the sum is 35.

The square root of 381222755 is about 19524.9265043431. The cubic root of 381222755 is about 725.0917077808.

The spelling of 381222755 in words is "three hundred eighty-one million, two hundred twenty-two thousand, seven hundred fifty-five".