381347351 has 18 divisors (see below), whose sum is σ = 487609920. Its totient is φ = 297149160.

The previous prime is 381347341. The next prime is 381347357. The reversal of 381347351 is 153743183.

It is not a de Polignac number, because 381347351 - 2¹⁰ = 381346327 is a prime.

It is a super-2 number, since 2×381347351² = 290851604229434402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381347357) 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 17 ways as a sum of consecutive naturals, for example, 26231 + ... + 38088.

It is an arithmetic number, because the mean of its divisors is an integer number (27089440).

Almost surely, 2^381347351 is an apocalyptic number.

381347351 is a deficient number, since it is larger than the sum of its proper divisors (106262569).

381347351 is a wasteful number, since it uses less digits than its factorization.

381347351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64355 (or 64337 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 381347351 is about 19528.1169343078. The cubic root of 381347351 is about 725.1706936970.

The spelling of 381347351 in words is "three hundred eighty-one million, three hundred forty-seven thousand, three hundred fifty-one".