381156323 has 12 divisors (see below), whose sum is σ = 393259680. Its totient is φ = 369390672.

The previous prime is 381156317. The next prime is 381156379. The reversal of 381156323 is 323651183.

It is not a de Polignac number, because 381156323 - 2¹² = 381152227 is a prime.

It is a super-3 number, since 3×381156323³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381156323.

It is not an unprimeable number, because it can be changed into a prime (381153323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239990 + ... + 241572.

It is an arithmetic number, because the mean of its divisors is an integer number (32771640).

Almost surely, 2^381156323 is an apocalyptic number.

381156323 is a deficient number, since it is larger than the sum of its proper divisors (12103357).

381156323 is a wasteful number, since it uses less digits than its factorization.

381156323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1739 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 381156323 is about 19523.2252202345. The cubic root of 381156323 is about 725.0495870959.

The spelling of 381156323 in words is "three hundred eighty-one million, one hundred fifty-six thousand, three hundred twenty-three".