229571381 has 4 divisors (see below), whose sum is σ = 247230732. Its totient is φ = 211912032.

The previous prime is 229571371. The next prime is 229571401. The reversal of 229571381 is 183175922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43112356 + 186459025 = 6566^2 + 13655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229571381 is a prime.

It is a super-2 number, since 2×229571381² = 105406037948494322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229571351) 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, 8829656 + ... + 8829681.

It is an arithmetic number, because the mean of its divisors is an integer number (61807683).

Almost surely, 2^229571381 is an apocalyptic number.

It is an amenable number.

229571381 is a deficient number, since it is larger than the sum of its proper divisors (17659351).

229571381 is a wasteful number, since it uses less digits than its factorization.

229571381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17659350.

The product of its digits is 30240, while the sum is 38.

The square root of 229571381 is about 15151.6131484407. The cubic root of 229571381 is about 612.3117342248.

The spelling of 229571381 in words is "two hundred twenty-nine million, five hundred seventy-one thousand, three hundred eighty-one".