381232111 has 4 divisors (see below), whose sum is σ = 410557672. Its totient is φ = 351906552.

The previous prime is 381232097. The next prime is 381232121. The reversal of 381232111 is 111232183.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 381232111 - 2¹⁹ = 380707823 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 (381232121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14662761 + ... + 14662786.

It is an arithmetic number, because the mean of its divisors is an integer number (102639418).

Almost surely, 2^381232111 is an apocalyptic number.

381232111 is a deficient number, since it is larger than the sum of its proper divisors (29325561).

381232111 is a wasteful number, since it uses less digits than its factorization.

381232111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29325560.

The product of its digits is 288, while the sum is 22.

The square root of 381232111 is about 19525.1660940439. The cubic root of 381232111 is about 725.0976394855.

Adding to 381232111 its reverse (111232183), we get a palindrome (492464294).

The spelling of 381232111 in words is "three hundred eighty-one million, two hundred thirty-two thousand, one hundred eleven".