229067981 has 4 divisors (see below), whose sum is σ = 230605500. Its totient is φ = 227530464.

The previous prime is 229067977. The next prime is 229067987. The reversal of 229067981 is 189760922.

It is a happy number.

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 88266025 + 140801956 = 9395^2 + 11866^2 .

It is a cyclic number.

It is not a de Polignac number, because 229067981 - 2² = 229067977 is a prime.

It is a super-2 number, since 2×229067981² = 104944279838832722, 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 (229067987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768536 + ... + 768833.

It is an arithmetic number, because the mean of its divisors is an integer number (57651375).

Almost surely, 2^229067981 is an apocalyptic number.

It is an amenable number.

229067981 is a deficient number, since it is larger than the sum of its proper divisors (1537519).

229067981 is a wasteful number, since it uses less digits than its factorization.

229067981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537518.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 229067981 is about 15134.9919392116. The cubic root of 229067981 is about 611.8638513050.

The spelling of 229067981 in words is "two hundred twenty-nine million, sixty-seven thousand, nine hundred eighty-one".