229381387 has 4 divisors (see below), whose sum is σ = 237291120. Its totient is φ = 221471656.

The previous prime is 229381379. The next prime is 229381421. The reversal of 229381387 is 783183922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783183922 = 2 ⋅391591961.

It is a cyclic number.

It is not a de Polignac number, because 229381387 - 2³ = 229381379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229381337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3954823 + ... + 3954880.

It is an arithmetic number, because the mean of its divisors is an integer number (59322780).

Almost surely, 2^229381387 is an apocalyptic number.

229381387 is a deficient number, since it is larger than the sum of its proper divisors (7909733).

229381387 is an equidigital number, since it uses as much as digits as its factorization.

229381387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909732.

The product of its digits is 145152, while the sum is 43.

The square root of 229381387 is about 15145.3420892365. The cubic root of 229381387 is about 612.1427705629.

The spelling of 229381387 in words is "two hundred twenty-nine million, three hundred eighty-one thousand, three hundred eighty-seven".