229615391 has 4 divisors (see below), whose sum is σ = 229655712. Its totient is φ = 229575072.

The previous prime is 229615363. The next prime is 229615403. The reversal of 229615391 is 193516922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193516922 = 2 ⋅96758461.

It is a cyclic number.

It is not a de Polignac number, because 229615391 - 2⁶ = 229615327 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 (229615291) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9866 + ... + 23591.

It is an arithmetic number, because the mean of its divisors is an integer number (57413928).

Almost surely, 2^229615391 is an apocalyptic number.

229615391 is a deficient number, since it is larger than the sum of its proper divisors (40321).

229615391 is an equidigital number, since it uses as much as digits as its factorization.

229615391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40320.

The product of its digits is 29160, while the sum is 38.

The square root of 229615391 is about 15153.0653994497. The cubic root of 229615391 is about 612.3508594814.

The spelling of 229615391 in words is "two hundred twenty-nine million, six hundred fifteen thousand, three hundred ninety-one".