381601111 has 16 divisors (see below), whose sum is σ = 416707200. Its totient is φ = 348068448.

The previous prime is 381601097. The next prime is 381601123. The reversal of 381601111 is 111106183.

381601111 = T₂₁₈ + T₂₁₉ + ... + T₁₃₁₉.

It is not a de Polignac number, because 381601111 - 2⁵ = 381601079 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 (381601141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256576 + ... + 258058.

It is an arithmetic number, because the mean of its divisors is an integer number (26044200).

Almost surely, 2^381601111 is an apocalyptic number.

381601111 is a deficient number, since it is larger than the sum of its proper divisors (35106089).

381601111 is a wasteful number, since it uses less digits than its factorization.

381601111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 381601111 is about 19534.6131520437. The cubic root of 381601111 is about 725.3315081640.

Adding to 381601111 its reverse (111106183), we get a palindrome (492707294).

The spelling of 381601111 in words is "three hundred eighty-one million, six hundred one thousand, one hundred eleven".