111630381 has 8 divisors (see below), whose sum is σ = 157595904. Its totient is φ = 70042560.

The previous prime is 111630371. The next prime is 111630383. The reversal of 111630381 is 183036111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111630381 - 2¹⁷ = 111499309 is a prime.

It is a super-2 number, since 2×111630381² = 24922683924410322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111630383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094365 + ... + 1094466.

It is an arithmetic number, because the mean of its divisors is an integer number (19699488).

Almost surely, 2^111630381 is an apocalyptic number.

It is an amenable number.

111630381 is a deficient number, since it is larger than the sum of its proper divisors (45965523).

111630381 is a wasteful number, since it uses less digits than its factorization.

111630381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188851.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 111630381 is about 10565.5279565197. The cubic root of 111630381 is about 481.4976098931.

Adding to 111630381 its reverse (183036111), we get a palindrome (294666492).

The spelling of 111630381 in words is "one hundred eleven million, six hundred thirty thousand, three hundred eighty-one".