381123512 has 32 divisors (see below), whose sum is σ = 890939520. Its totient is φ = 148489440.

The previous prime is 381123473. The next prime is 381123521. The reversal of 381123512 is 215321183.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 308738 + ... + 309969.

It is an arithmetic number, because the mean of its divisors is an integer number (27841860).

Almost surely, 2^381123512 is an apocalyptic number.

It is an amenable number.

381123512 is an abundant number, since it is smaller than the sum of its proper divisors (509816008).

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

381123512 is a wasteful number, since it uses less digits than its factorization.

381123512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618731 (or 618727 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 381123512 is about 19522.3848952939. The cubic root of 381123512 is about 725.0287817349.

Adding to 381123512 its reverse (215321183), we get a palindrome (596444695).

The spelling of 381123512 in words is "three hundred eighty-one million, one hundred twenty-three thousand, five hundred twelve".