229209431 has 4 divisors (see below), whose sum is σ = 250046664. Its totient is φ = 208372200.

The previous prime is 229209403. The next prime is 229209469. The reversal of 229209431 is 134902922.

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

It is a cyclic number.

It is not a de Polignac number, because 229209431 - 2⁶ = 229209367 is a prime.

It is a super-2 number, since 2×229209431² = 105073926518687522, 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 (229209401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10418600 + ... + 10418621.

It is an arithmetic number, because the mean of its divisors is an integer number (62511666).

Almost surely, 2^229209431 is an apocalyptic number.

229209431 is a deficient number, since it is larger than the sum of its proper divisors (20837233).

229209431 is a wasteful number, since it uses less digits than its factorization.

229209431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20837232.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 229209431 is about 15139.6641640427. The cubic root of 229209431 is about 611.9897678313.

The spelling of 229209431 in words is "two hundred twenty-nine million, two hundred nine thousand, four hundred thirty-one".