229697281 has 4 divisors (see below), whose sum is σ = 250578864. Its totient is φ = 208815700.

The previous prime is 229697257. The next prime is 229697287. The reversal of 229697281 is 182796922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229697281 is a prime.

It is a super-2 number, since 2×229697281² = 105521681797585922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229697287) 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, 10440775 + ... + 10440796.

It is an arithmetic number, because the mean of its divisors is an integer number (62644716).

Almost surely, 2^229697281 is an apocalyptic number.

It is an amenable number.

229697281 is a deficient number, since it is larger than the sum of its proper divisors (20881583).

229697281 is a wasteful number, since it uses less digits than its factorization.

229697281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20881582.

The product of its digits is 217728, while the sum is 46.

The square root of 229697281 is about 15155.7672521057. The cubic root of 229697281 is about 612.4236470699.

The spelling of 229697281 in words is "two hundred twenty-nine million, six hundred ninety-seven thousand, two hundred eighty-one".