229781591 has 8 divisors (see below), whose sum is σ = 247577904. Its totient is φ = 212002560.

The previous prime is 229781561. The next prime is 229781597. The reversal of 229781591 is 195187922.

It is a happy number.

229781591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 229781591 - 2⁶ = 229781527 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 (229781597) 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, 40871 + ... + 46151.

It is an arithmetic number, because the mean of its divisors is an integer number (30947238).

Almost surely, 2^229781591 is an apocalyptic number.

229781591 is a deficient number, since it is larger than the sum of its proper divisors (17796313).

229781591 is a wasteful number, since it uses less digits than its factorization.

229781591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8641.

The product of its digits is 90720, while the sum is 44.

The square root of 229781591 is about 15158.5484463388. The cubic root of 229781591 is about 612.4985675935.

The spelling of 229781591 in words is "two hundred twenty-nine million, seven hundred eighty-one thousand, five hundred ninety-one".